1. The eight core functions simplify the complexity and focus on practicality, and each function is born for your safety 2. The full-frequency mobile speed measurement radar speedometer can receive XK, KA, CT, LASER and other advance speed measurement warnings at a full frequency. The distance is 200-800 meters (accurate speed measurement is 300 meters) to driving safety. 3. All-round depth warning, front and rear scanning effective speed measurement point distance is 800M in the forward direction, 300M in the reverse direction, timely warning at any angle, no blind zone in speed measurement. 4. Accurately measure the speed of the car, the LED display allows the driver to know the current driving speed, easy to operate and master the of use : Type: Radar speedometer Model: Measuring range: 200m-800m Measurement accuracy: 200m Resolution: digital tube LED display Working voltage: 12 (V) Scope of application: general Material: plastic colour: black Package Contents: 1 x host 1 x car charging cable 1 x anti-slip mat 1 x English instructions 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.