... tracker/car gps tracker/gps tracker manufacturer/gsm gps tracker/cheap car gps tracker GSMFrequency channel850MHz/900 MHz /1800MHz /1900MHzGPRSClass ... alarm2,Vehicle alarm to mobile phone3,Control by mobile phone messages4,oil and line by remote control5,parking time record6 ... detection, sensitive and no false positives, Five levels adjustable6,Phone lock the vehicle/car, just such as put the car ...