Key features: OBDII and CANBUS protocol, DC 12V and 24V; 2G GSM/GPRS 850/900/1800/1900MHz; 3G UMTS/HSPA 2100/1900/850/900MHz; Plug and play, Small size, no installation cost; Collect fuel consumption, fuel level data; Very accurate mileage data (accuracy>99%); Collect DTC (Diagnostic Trouble Code) for remote diagnostic; Collect VIN, engine temperature; Internal GSM and GPS antennas; TCP and UDP protocol; Update firmware over the air; Illegal start-up, impact and rollover alarm; Detect harsh acceleration, braking, turn and high revolution; Driving behavior recording and analysis; Store break points data in non-volatile memory; Track on google map and other maps; Android, iOS APP & telematics software free for ever; Auto sleep mode to save automotive power; Wide working temperature range: -30 to +80;;. Specification: GSM Dual-band: 900/1800MHz Quad-band: 850/900/1800/1900MHz Compliant to GSM/GPRS phase2/2+ EGSM900/GSM850 class4(2W) GSM1800/GSM1900 class1(1W) GPRS Class 12,TCP/IP Built in GSM module GPS U-blox GPS module, -162dBm Accuracy:2.5m(open sky),Speed:0.1m/s OBDII STN/ELM327 chip 3G UMTS/HSPA 900/2100MHz 850/1900MHz (add USD 5); Telit 3G module, registered by world-wide carriers Start-up time Warm start-up: 1s(open sky) Cold start-up:< 29s(open sky) GPS start-up:< 29s(open sky) Temperature Storage temperature:-40~+85 ;; Operating temperature:-30~+80 ;; Diagnostic Protocol ISO 15765-4 (CAN) ISO 14230-4 (Keyword Protocol 2000) ISO 9141-2 (Asian, European, Chrysler vehicles) SAE J1850 VPW (GM vehicles) SAE J1850 PWM (Ford vehicles) ISO 15765 ISO 11898 (raw CAN) SAE J1939 OBD protocol Voltage Operation voltage range:DC 12 or 24V Dimension 62*48*20mm Box size:13cm*19cm* 5.7cm G.W: 0.55kg Carton size:54cm*40cm*31cm Quatities(pcs):40PCS N.W/G.W: 22kg/23.5kg