Features: * Plug & Play: Automatically turn on / off as the car starts and stops. * Speed Unit: KM/H & MPH Switch freely. * Built-in high-precision GPS module with dual-channel satellites. Real-time display car's Speed,Voltage, also Attitude * Display Time Clock, Single Driving time and distance * HD LCD screen with high display resolution. * Adopt ABS high temperature resistant material. * No speed Skip: Introducing core algorithm technology, adding speed lubrication effect, no skip speed, more coherent and smooth display. * Different alarms: over-speed, over/high voltage, abnormal altitude... * Built-in light sensor: Adjust brightness automatically with environment. * Widely apply for all kinds of cars. Specifications: *Power Supply: DC 10V ~ 30V *Time Error: 1minute *Voltage Precision: 0.5V *GPS Cold Start Duration: 32s Average *GPS Update Rate: 1S *Working Temperature: -40 +80 *Roll Angle: -40~ +40 *Voltage Range: DC 5V ~ 30V *Speed Precision: 0.36Km/h *GPS Hot Start Duration: 1s(Average) *Wireless Transmission Frequency: 2.4GHz Package Included: 1X Main Host 1X USB Cable 1X Crowbar 1X Manual Notes: 1. Please check the dent or ding size and choose the proper size of tab for perfect maintainance. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real as standard.