Features: brand new and high quality Manual or automatic adjustment of brightness, alarm sound switch, automatic power on/off. Automatically turn on and off as the car starts and stops. With over-speed, emergency brake warning , safty belt, auto brake alarm,door reminding, high/ Low beam lights etc for Smart size, easy to install, plug and for play. Body battery monitoring, display alarm when the battery is low.Classic color matching, clear display of multiple colors, reading driving data is more concise and easy to understand Specifications: Size: approx 102x53x28mm/4.02x2.09x1.1in Item Number:T4 Weight: 360g Product Color: Black Speed Unit: MPH/for KM/h (exchangeable) Display Contents: Speed, Battery ,Gear , Turning Light, Belt,Door etc Note: Please allow 1-2cm errors due to manual measurement. Because of the different display of each computer, the pictures may not reflect the actual color of the item. Package includes: 1 PC x T4 HUD 1 PC x Non-slip Mat 1 PC x Reflective Film 1 PC x Manual 1 PC x Cable 1 PC x for Crowbar