... 1.575GHZ frequency channel 20-channel, route planning inquiries to complete the moment. CPU: the main chip models SAMSUNG ... jamming ability. audio can be FM radio FM player to the car stereo, listening and efficient way road Dialectic SD ... external DC12V, direct access car cigarette lighter. easy navigation conditions: temperature and humidity range of -10 to +70 , 45% to 80% RH, atmospheric pressure ...