Features: GPS+Beidou+LBS precise positioning. OBDII interface 16 pins. Plug and for play, easy installation; Mobile APP/platform online viewing. Functions include: real-time positioning, overspeed alarm, vibration alarm, displacement alarm, ACC state detection. Specifications: Material: Plastic Size: Approx.5x2.5x3.8cm/1.96x0.98x1.49inch Working current: <45mA@12V Standby current: <5mA@12V Positioning method: Beidou/GPS dual satellite positioning Positioning accuracy: 5-10 meters Working temperature: -20℃~75℃ Working humidity: 5%~95% Interface: 16PIN standard OBDII interface Communication module brand/chip model: MT6261D Communication frequency band: support 2G: 850/900/1800/1900MHz SIM Card: for Nano SIM Card Antenna: Built-in GPS+GSM antenna Cold start time: 32 seconds on average Hot start time: 1 second on average Sensitivity : -162DBM Package Includes: 1x OBD Voice Monitor note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.