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	This Item Whistler XTR-540 Cordless Radar Detector	Recommendations Radenso DS1 Extreme Range Radar Detector - Magnet Mount, Bluetooth, Color OLED Display, Less False Alerts, Auto GPS Lockouts, USA Technical Support	KARADAR S360 Radar Detector – X/K/Ka Band & Laser Detection, City/Highway Mode, VG-2 Immune, detectable Police Speed Trap Detector for Cars LaserEye and False Alert Filtering	UNIDEN R4 Extreme Long-Range Laser/Radar Detector, Record Shattering Performance, Built-in GPS w/AUTO Mute Memory, Voice Alerts, Red Light & Speed Camera Alerts, Multi-Color OLED Display, Black	Car Detector, Universal Mobile Speed Detector Device, Full Frequency Receiving X K KA, with Real Time Voice Prompt	Radenso XP Radar & Laser Detector with GPS Lockouts
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Price	—	$349.95	$76.00	$379.99	-8% $20.55 Typical: $22.23	$189.95
Delivery	—	Get it as soon as Tomorrow, Jun 14	Get it as soon as Wednesday, Jun 18	Get it as soon as Wednesday, Jun 18	Get it as soon as Wednesday, Jun 18	Get it as soon as Wednesday, Jun 18
Customer Ratings	4.0283	4.5286	4.219	4.6862	2.67	4.61,054
Sold By	—	Pro Audio Center (Authorized Dealer)	prolechA	Amazon.com	Seinada	Pro Audio Center (Authorized Dealer)
power source	Battery Powered	USB-C	Vehicle Power Socket	Corded Electric	12V DC	DC
display type	Graphical Text	OLED	LCD	OLED	Digital tube	OLED
frequency bands	X-band, K-band, Ka-band	X, K, Ka, Gatso, MultaRadar Detection (MRCD, MRCT), Laser (LIDAR)	10.525 GHz, 24.125 GHz, 34.700 GHz	24.125 GHz, 34.7 GHz	10.525 GHz, 24.150 GHz, 24.125 GHz, 34.700 GHz, 33.400 GHz, 11.150 GHz	X, K, Ka, Laser
voltage	—	—	12 volts	12 volts	12 volts	12 volts of direct current

Product Description

Cordless Radar Detector with Digital Compass

Amazon.com

Amazon.com Product Description Whistler's XTR-540 laser/radar detector gives you full band protection from radar signals, 360-degree laser detection, Whistler's patented VG-2 cloaking technology, and plenty more. The brilliant blue text display, along with tone alerts and Whistler's unique alert periscopes, mean you'll never miss an alert. Competitive features and competitive pricing.

Competitive features and competitive pricing. Click to enlarge.

Battery Powered
The unit can provide approximately 15 hours of laser/radar detection with three rechargeable AA Ni-MH batteries, or you can plug it into your vehicle's cigarette lighter adapter (this will recharge the batteries).

Blue LCD Text Display
The XTR-540's brilliant display provides distinct visual confirmation of signals detected, signal strength, and indicates engaged modes of operation.

Patented POP Mode Detection
There are new guns out there that operate just like the instant-on guns of the past but with a very tough new twist--POP mode! This new gun is a normal K and Ka band radar gun detectable by most radar detectors made in the past 30 years until it's in POP mode. When the gun is in POP Mode and activated, a brief burst of energy, less than 1/15 of a second, is transmitted and the vehicle's speed is quickly acquired. A detector without POP Mode detection capability cannot respond to this brief transmission, but the XTR-540 can.

Low Profile Alert Periscopes
Whistler's Low Profile Alert Periscopes provide an added attention getting visual alert. The two extra LEDs flash on and off when the unit alarms to provide a unique visual alert.

3 City Modes/Highway Mode
Highway mode provides full audio and visual warning of laser/radar systems while maintaining full sensitivity. Highway mode is the default setting of all Whistler's laser/radar detectors. City mode helps reduce the annoyance of automatic door openers and burglar alarm alerts by providing an initial alert (same distance as Highway Mode) then remaining quiet unless the signal strength becomes very strong. When the signal increases the unit will alert briefly to notify you of the change in signal strength.

Brilliant blue LCD text display.

View features diagram. Click to enlarge.

Stay Alert
The Stay Alert feature is designed to test a driver's alertness. Within 30 to 60 seconds after the feature is engaged an alert is sounded; to show alertness, the driver must press the volume, city or the mute button within 3-5 seconds. If a button is pressed within 3-5 seconds, the cycle is repeated. If a button was not pressed within 3-5 seconds the unit alarms at full volume and the display shows an unique visual alert.

Quiet/Auto Quiet Modes
Pressing QUIET before a signal is detected engages Auto Quiet Mode, which automatically reduces the audio level after the initial warning to a low audio level setting. Pressing QUIET during a radar/laser encounter silences audio alerts, while allowing visual alerts to keep you informed.

Alert Priority
When two or more signals are received at the same time, the alert priority is: Laser, VG-2, Speed Radar, Safety Radar.

Example: If X band is alerting, then suddenly a VG-2 signal is detected, the VG-2 warning will override the X band alert.

Vehicle Battery Saver Mode
The Vehicle Battery Saver Mode automatically shuts off your detector within 3 hours if you forget to turn it off. The timer is reset if the detector is turned off, unplugged or any button is pressed before the 6 hours have expired. The detector will alert you with an audible and visual warning before it shuts off.

Safety Warning System--SWS
This relatively new radar is not for speed detection at all, it is used to keep you informed of highway safety. Transmitters are installed and programmed (for example: in emergency vehicles) to make you aware of possible situations that may require your attention, such as: ambulance vehicles that are moving or stationary, road hazards ahead, road construction delays or detours, etc.

VG-2 Detection Mode
The VG-2, also known as a "radar detector detector," is a special receiver used by police to detect signals radiated by a radar detector. The XTR-540 alerts you its presence, and thanks to Whistler's patented VG-2 cloaking technology provides undetectability.

What's in the Box
Whistler XTR-540 Laser/Radar Detector, Windshield Mount, Power Cord, Three AA Ni-MH Batteries, User's Manual

Product information

Product Dimensions	4.9 x 3.15 x 1.4 inches
Item Weight	9 ounces
ASIN	B001TE3VBG
Item model number	XTR-540
Batteries	3 AA batteries required. (included)
Customer Reviews	283 ratings 4.0 out of 5 stars
Best Sellers Rank	#1,693 in Radar Detectors
Is Discontinued By Manufacturer	Yes
Other display features	Wireless
Manufacturer	Whistler
Date First Available	September 1, 2003

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Customers say

Customers find the radar detector offers good value for money and appreciate its cordless design. However, the functionality and accuracy receive mixed reviews - while some say it works well and detects police radars, others report it doesn't work at all and isn't accurate. Moreover, the battery life is poor, lasting only ten minutes, and the display is hard to read in daylight. Additionally, customers report issues with false alarms and find the setup process not intuitive.

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Value for money Cordless Functionality Accuracy Ease of setup Battery life False alarms Display quality

21 customers mention "Value for money"21 positive0 negative

Customers find the radar detector offers good value for money.

"...For the price it's a great deal." Read more

"...Its been well worth the money invested." Read more

"The radar detector worked, no doubt about that and the price is perfect; however, there is two things that I could not just look over...." Read more

"...I love that it is less clutter than the wired detectors I've used in the past...." Read more

12 customers mention "Cordless"12 positive0 negative

Customers appreciate that the radar detector is cordless, with one customer noting it doesn't have a wire hanging down.

"...Cordless...." Read more

"This new whistler is great!!! The fact that it is cordless makes it universal from car to motorcycle...." Read more

"I bought this detector for the fact that it was cordless, I hate having cords dangling from the dash all the way to the mirror...." Read more

"...I really like the fact that it is cordless which is one of the reasons I purchased this. I get a fair amount of false positives which is annoying...." Read more

80 customers mention "Functionality"54 positive26 negative

Customers have mixed experiences with the radar detector's functionality, with some saying it works quite well and is surprisingly capable, while others report that it doesn't work at all.

"Surprisingly capable. I used it on my motorcycle over 2,700 mile round trip from florida to KY and back and it saved my bacon multiple times...." Read more

"...It worked well and picked up highway police radar a good 1/4 mile before I saw them so to me, that works...." Read more

"...Save you money and get Whistler 440 model because the compass didn't work most of the time with resetting it!" Read more

"...I let it go when I sold my car. Due to it's great performance, I decided to stay with Whistler this time. 1.) Screen display...." Read more

34 customers mention "Accuracy"21 positive13 negative

Customers have mixed opinions about the radar detector's accuracy, with some finding it effective at detecting police radars while others report it is not a good detector.

"...UPDATE 7/26/2013 The radar was so great that it was stolen from my car! :..." Read more

"...The compass is weak, you have to reset it all the time...." Read more

"...It worked well and picked up highway police radar a good 1/4 mile before I saw them so to me, that works...." Read more

"...is apparent from reading the reviews that, for the most part, is a great detector...." Read more

18 customers mention "Ease of setup"7 positive11 negative

Customers have mixed experiences with setting up the radar detector, with some finding it straightforward while others report it's not intuitive.

"This is a great detector, but it's menu system and setup isn't the most clear. It took me a few tries to get the settings to stick...." Read more

"...It was easy to set up (the manual is short, sweet and straightforward)...." Read more

"...It is also a bit hard to program and annoying to do so but once you have it set up the way you like, it does the trick...." Read more

"...A little difficult to set up, a number of options that aren't that obvious, but again more features may well help in the future." Read more

58 customers mention "Battery life"15 positive43 negative

Customers report significant issues with the radar detector's battery life, noting that it drains quickly and only lasts about ten minutes on charge.

"...I used it on battery only and it's quite sensitive to low batteries, but if they are fully charged I got around 5 or 6 hours in highway use before..." Read more

"...Also, the batteries don't last long (<2hrs) if you keep the LED on "BRT-BRT" and of course if you forget to shut it off, shocker, the..." Read more

"...The fact that it can either be plugged in or run on batteries is also very appealing...." Read more

"...Never will I buy another Whistler radar dectector! The batteries only lasted about 2 days with battery saver mode enabled...." Read more

16 customers mention "False alarms"3 positive13 negative

Customers report issues with false alarms from the radar detector.

"...features seemed to be outstanding for the price but since it did not pick up signals and was quite heavy and difficult to take with me when leaving..." Read more

"...All kinds of false signals seem to set it off. Also, it sounds like an Atari 2600 when it alerts. Lastly, it's a lot bigger than the pics indicate...." Read more

"...I have no problem reading the display my problem lies in the false alerts! There are SO MANY...." Read more

"...Like all radar detectors, it alerts to all sources, not just police, but this one seems to do a better job than the last on discriminating...." Read more

11 customers mention "Display quality"0 positive11 negative

Customers report issues with the radar detector's display, noting that it is hard to read in daylight and fades from heat.

"...Thought I'd "step up" to a readable display. Not even visible in daylight. Too small to read. Disappointing. 2.) Alert notifications...." Read more

"...not be left in direct sunlight or used in a hot car the display will fade from the heat because its a Liquid crystal display,the batteries are not..." Read more

"...The problem with this device is that in the day time, you can not see the screen AT ALL!..." Read more

"...Hard to read the display in the daylight, and with hot weather, completely LCD is completely unreadable. I'm happy with the buy." Read more

Top reviews from the United States

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Mrr2023
Great device, worth every dollar!
Reviewed in the United States on July 9, 2010
Product Packaging: Standard PackagingVerified Purchase

I've purchased this radar detector right before a long, interstate road trip (WA, OR, CA). It was easy to set up (the manual is short, sweet and straightforward). The fact that it can either be plugged in or run on batteries is also very appealing. The only feature that I do not use is the compass, but that's only because I haven't found a spot to calibrate in yet.

All in all, this little gadget saved me from at least 5 speeding traps in one weekend! I don't really use it in the city, but for highways, I definitely recommend it.

UPDATE 7/26/2013

The radar was so great that it was stolen from my car! :( And I was more sad about it being stolen than my wallet.

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4 people found this helpful

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Bob Cox
Surprisingly capable
Reviewed in the United States on October 29, 2015
Product Packaging: Standard PackagingVerified Purchase
Surprisingly capable. I used it on my motorcycle over 2,700 mile round trip from florida to KY and back and it saved my bacon multiple times. I used it on battery only and it's quite sensitive to low batteries, but if they are fully charged I got around 5 or 6 hours in highway use before it started complaining. For the price it's a great deal.

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7 people found this helpful

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House stuff
People don't read the instructions.
Reviewed in the United States on September 6, 2014
Product Packaging: Standard PackagingVerified Purchase
For $60 it's a good wireless detector if you have multiple cars and don't want to drop $400 on a top-of-the-line. It worked well and picked up highway police radar a good 1/4 mile before I saw them so to me, that works. The compass feature is ok but not really necessary. If you leave the compass on, it drains the battery faster. Also, the batteries don't last long (<2hrs) if you keep the LED on "BRT-BRT" and of course if you forget to shut it off, shocker, the battery dies.

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4 people found this helpful

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TrUsTiNnOoNe!
Only lasted for 4 months before dying!
Reviewed in the United States on October 27, 2010
Product Packaging: Standard PackagingVerified Purchase
Got this one to replace my old Whistler. When I first got the unit, the batteries included that recharged; didn't keep a charge. Called Whistler 1-800# and spoke with customer service and they told me to buy new batteries or else I would have to ship the product back and pay for return shipping just to get a new unit.

I didn't want to deal with that, so I bought new batteries. Never will I buy another Whistler radar dectector! The batteries only lasted about 2 days with battery saver mode enabled.

The compass is weak, you have to reset it all the time. I don't even use it everyday, just about 12 hours a week and this POS is already broken.

Sending it back to Whistler for warranty work, hope they fix it!

It did however work good on my road trip to Hollywood, it saved me about 5 tickets so far. The range is better with using the ac adapter then using batteries. The only reason I got this one was because it was meant to be used cordless with no wires!

Save you money and get Whistler 440 model because the compass didn't work most of the time with resetting it!

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4 people found this helpful

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Traveler
Not up to par.
Reviewed in the United States on June 19, 2012
Product Packaging: Standard PackagingVerified Purchase
I had a Whistler for years and liked it. Saved me many a times. I let it go when I sold my car. Due to it's great performance, I decided to stay with Whistler this time.
1.) Screen display. Old one was colored lights. Thought I'd "step up" to a readable display. Not even visible in daylight. Too small to read. Disappointing.
2.) Alert notifications. A - Sound is barely audible. If the stereo is on at all, with it's volume turned all the way up, can't hear it. B - Periscope lights are a joke. Don't work in daylight. At night very moderate.
3.) Cordless. With all the lights turned off unless there's an alert, the batteries last for about an hour. This was my main criteria for selecting this model. Hate wires. Makes installation a breeze. Allows for optimum placement without having dangling wires. This all failed miserably. Must leave it plugged in all the time. Going to try better rechargeable batteries. Shouldn't have to.

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2 people found this helpful

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RGIN
Great Product!!
Reviewed in the United States on January 31, 2010
Product Packaging: Standard PackagingVerified Purchase
This new whistler is great!!! The fact that it is cordless makes it universal from car to motorcycle. It's charger works very well when plugged in to a power point for a short time. The XTR-540 lasts a whole week on one charge on my work commute, (approx 12 hours). Since my commute is 45 minutes to and from work, the battery saver set to 1 hour works well for me.
On the other side, this unit will detect radar alot further than the eye can see, if it alarms, you better believe it.
Buy it!!! for the money, it's the best on the market. It's better than my last $400.00 Escort that was stolen.

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28 people found this helpful

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cjqlee
good buy
Reviewed in the United States on February 28, 2012
Product Packaging: Standard PackagingVerified Purchase
I bought this for my son since his car does not have an outlet to plug anything in. The batteries go quickly so I suggest using rechargable batteries for longer life span. Its been well worth the money invested.

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Brand	Whistler
Frequency Bands Supported	X-band, K-band, Ka-band
Power Source	Battery Powered
Display Type	Graphical Text
UPC	052303404528 854432537111
Global Trade Identification Number	00052303404528

Whistler XTR-540 Cordless Radar Detector

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Top reviews from the United States

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5.0 out of 5 stars Great device, worth every dollar!

5.0 out of 5 stars Surprisingly capable

4.0 out of 5 stars People don't read the instructions.

3.0 out of 5 stars Only lasted for 4 months before dying!

1.0 out of 5 stars Not up to par.

5.0 out of 5 stars Great Product!!

5.0 out of 5 stars good buy

Great device, worth every dollar!

Surprisingly capable

People don't read the instructions.

Only lasted for 4 months before dying!

Not up to par.

Great Product!!

good buy