Operation Manual needed - PLEASE

Please visit Whistler's website at www.whistlergroup.com and click on The search box and enter XTR-135. This will bring up the spec page that will have the manual listed.

Please visit www.whistlergroup.com and click on the top red button marked "MANUAL" then the blue button labled "RADAR DETECTORS" and you will see the XTR-555 listed.

The radar detector goes through a quick diagnostic check at power up - not unlike a computer does at boot time. During this time, critical operational parameters are checked and should any be found out of spec, you receive a warning message - letting you know that all is NOT well. You can not expect to have the same level of warning or protection from this device while it is not operating as designed.

Your best best is to contact Beltronics Customer Support and review your options with a representative.

I hope this helped - good luck!

The service message indicates something isn't working as expected. This usually happens right after powering on, when the detector runs its self-check and receives an unexpected result. Continuing to rely on this device for radar warnings could be expensive.

Contact Escort Radar Support to arrange for service to restore reliable operation.

I hope this helps.

Ask http://manualfox.com

Radar detectors are not police detectors. Radar detectors only alert to police when the police have their radar guns turned on. Most police officers operate their radar guns in "instant-on" mode rather than leaving their radar guns turned on continuously. Instant-on operation involves very briefly turning the radar gun on for up to a second or two in order to get a vehicle's speed.

Cobra radar detectors are known to have great difficulty detecting the 35.5 Ka band radar gun frequency. This should be considered a serious problem since 35.5 Ka is the second most popular Ka radar gun frequency following the most commonly encountered 34.7 Ka radar gun frequency. There isn't much that Cobra can do about this issue since their competitors hold all of the really good patented solutions for detecting 35.5 Ka police radar while ignoring false alerts caused on this frequency due to other radar detectors.

Try doing a "factory reset" per the instructions in the user manual. Sometimes the firmware settings get hosed, and performing a reset restores proper operation.

Check Here required user manual please.

contact Whislter at 800-531-0004 to order a speaker for your 1660.

verify power to unit.