Applicable to domestic car series, Asian car series, American car series and European car series Equipped with high-precision GPS + Beidou dual-channel module Fully automatic monitoring of vehicle driving conditions Super font HD display LED light display Designed with PC high temperature resistant material with the car, automatic sleep function when parking Double display on front and back Speed, time, temperature display Overspeed alarm This product is a car HUD rear window display instrument, through GPS/North The dual-channel module obtains data from satellites, and has the advantages of dual-signal stability. Universal for all models on the market. Product parameters GPS car Power supply: 11.5V~30V; Working environment: -40~+80; Size: 3 0 0 x 1 6 0 x 1 M; Speed range: 0~199; Clock error: Less than 1minute; Colour:black Material:PC Package Contents: 1 x heads up display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.