Whistler XTR-540 Cordless Radar Detector

• Total Band protection with selectable bands
• Low-profile alert periscopes
• Radar Signature ID (RSID)
• Cordless platform
• Intense blue text display
• Battery Operated
• 72 Point Digital Compass
• Internal Battery Charger
• Battery Voltage Gauge
• 360° Maxx Coverage

The only difference between this detector and the xtr-440 is the compass mode, which I did not find worked well when I bothered to calibrate it, which you have to re-do every time you move it from the mounted position. So now I just don't use that feature, and could have spent a bit less to skip it. Also, when you have the unit on and plugged in to DC power, it will invariably shut itself off with much beeping one hour into your drive. It's not an issue on short drives, but on any car trip of length, be ready to unplug it and plug it back in when it starts shutting itself off every hour.

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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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I bought this for my girlfriend's car that I drive from time to time. It alerts the user to threats through the audible alert system, but it is hard to remember the different sounds, which is why it is great to be able to visually see what the threat is. The problem with this device is that in the day time, you can not see the screen AT ALL! No matter if you change the brightness of the screen or change the viewing angle, it is impossible to see what threats are in the area. At night, you can see it ok, but it is still not up to the quality I believe it should have. Final review....spend your money on a different radar detector (I wish I would have returned it, but was too busy to deal with the problem).

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I've had the XTR-540 for about a week now, and so far, so good. Nice display, nice suction cup mount. Minimum number of false alarms. Fairly intuitive setup and menu system. Seems to be holding a charge fairly long. Nice compact size for a cordless unit.

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Just purchased and used on a 2500mi round trip through various states. Once I learned the settings and set the unit up how I wanted, it performed well. Only drawback was the amount of battery time consumed. However, with modified settings I can probably improve battery life time.