The Whistler GT138Xi radar detector is a entry level radar. It has an easy-to-see ICON display that is easily visible in all light conditions - day or night. This basic unit is perfect if you're wanting piece of mind without spending too much. Features: FDSR (Field Disturbance Sensor Rejection) combats false alerts caused by collision avoidance and blind spot detection systems in newer vehicles TFSR (Traffic Flow Sensor Rejection) helps eliminate alerts from radar based traffic flow sensors DETECTS EUROPEAN LASER GUNS Trafficpatrol XR, Reigl, Jenoptik, Laveg, Truspeed and more ICON DISPLAY provides distinct visual symbols of alerts detected and engaged modes Ka NARROW MODE looks only for the following Ka Frequencies: 34.0 GHz and 34.3 GHz POP™ MODE DETECTION advanced speed detection capability responds to brief bursts of radar 360° MAXX COVERAGE advanced speed detection capability responds to brief bursts of radar 3 CITY MODES detects from front, sides, and rear DIM / DARK MODES reduce the illumination of the display. When in dark mode, the display is turned off during an alert then remains off for 20 more seconds before returning to its dimmer setting. HIGH GAIN LENS provides increased field of view which means better range TONE ALERTS provide audible alerts for bands received QUIET / AUTO QUIET MODES silence audio alerts ALERT PRIORITY displays most important signal when more than one is detected SETTING SAVER saves personalized settings when unit is turned off VEHICLE BATTERY SAVER automatically shuts off your detector if you forget to turn it off - VG-2 DETECTION when engaged, alerts to VG-2 presence Whistler detectors receive these radar frequencies: 10.500 - 10.550 GHz X Band 24.050 - 24.250 GHz K Band 33.400 - 36.000 GHz SuperWideBand Ka Specifications: SIZE: 25.4mm (H) x 72.4mm (W) x 105.4mm (L) WEIGHT: 130.4 g Insert Colour: Black Power: 12V Warranty: 1 year Included Accessories: Windshield Bracket Kit, Cigarette Socket Power Cord, Manual