Features: Functions:Speed, clock, driving direction, driving distance, driving-time, number of satellites, 100km acceleration-time, driving direction angle, altitudes. Speed alarm, fatigue driving reminder function, improve driving safety. Low-power chip, non-destructive standby completely solves the problem of high power consumption! Intelligent switch machine, start and close with the-car. Small body, clear and natural in any corner, without blocking any line of sight. A variety of displays, one-key switching. Zero-consumption of USB power supply, complete power off when the-car is turned off. Specifications: Material:ABS+PC Size: Approx.16.8x4.3cm/6.61x1.69inch Color:Black Model: G3 Screen Type: LED Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Host 1x USB Cable 1x Anti-skid Pad 1x Manual