2.2 inch HD display, small and compact design. Auto power on/off: HUD turns on and off with vehicle ignition to help protect car battery; includes manual switch mode for easy control. Automatic and manual brightness adjustment for comfortable viewing without glare. Plug and play setup, compatible with most vehicles. Displays speed and driving distance. Shows driving direction. Automatic light sensitivity adjusts to ambient conditions. Switch between miles and kilometers. Sound alarm on/off option. Speeding alert and fatigue driving reminder. Light color options: white or green. Color: black. Material: ABS. Package Contents: 1 x HUD 1 x USB Cable Note: Other items not included. Note: Lighting and monitor differences may cause slight color variation between image and actual product. Measurement error allowed within +/- 1-3 cm.