Specification Contend GSM 850/900/1800/1900Mhz GPRS Class 12/10/8,TCP/UDP built-in GSM module GPS channel 22 GSM antenna Built-in quad band GPS antenna 2antenna, built-in ceramics high gain antenna, external antenna Tracking sensitivity -165dBm Acquisition sensitivity -148dBm Position accuracy 5m LED display 2LED lights to show GPS, GSM status Battery 800mAh Working voltage 9V-39V Working temperature -45鈩-70鈩 Humidity 5%-95% Weight 108g Memory 2M Dimensions 89*93mm*22mm Certificate CE, FCC