... tracker/gps tracker manufacturer/gsm gps tracker/cheap car gps tracker GSMFrequency channel850MHz/900 MHz /1800MHz /1900MHzGPRSClass 12, ... 3E, explosion-proof, CE, ROHS certified2,Dual built-in antenna design, waterproof ,dustproof anti-corrosion and anti-interference3,Support wide ... , Five levels adjustable6,Phone lock the vehicle/car, just such as put the car in your pocket, Anti theft and do ...