Up Display is designed for preventing accident, which can project important information (e.g. vehicle speed) onto the front windshield at the eye level of the driver. Besides, the display location and brightness can be adjusted through automatic induction, which can prevent the driver from looking down at the instrument panel and shorten the time of eyes for the blind spot in front. This can avoid breaking rules and regulations due to speeding in many speed-limited sections. What is more important, it can enable the driver to read the number instantly without shifting horizon, which is of vital value in reducing traffic accidents caused by absent-mind due to looking down. With Over speed Alarm function, You could set the Max speed to alarm, keep from Road Fine Name:HUD Up Display Item:H80 Working Voltage: 9 - 16V Working Electric Current:180mA Port:OBDII Size:147 x 85 x 42mm Weight:300g Material:ABS Colour:black Package Contents: 1 * Up Display 1 * OBD II Cable 1 * Nylon Sticker Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.