Premium Parking Sensor System With the strictest quality certificate of Germany(E1): Wireless Type: 1.Model No. LF-PWL01 Wireless Quadrate LCD Type : Key features: Switch on automatically when reverse gear is engaged 4/6/8sensors design, 6/8 sensor designed for detecting obstacles from both front and rear bumper of car Automatic three different colors indicating according to difference detection range 15 different warning phases FM transmitting from display to control box, wireless display. Easy installation Digital,direction,visual and acoustic alert Voice alert function(This function can be switched on or off) Embedded installation Technical data: Working Voltage: 10~ 15 V Max. Power: 3.6W Working temperature: - 35°C~ + 70 °C Detecting distance: 0.1 m ~ 1.5 m Measuring error: ±0.05 m Sensor detection angle: 60 ° Alarming Volume of built-in Siren: 80dB Alarming Volume of external Siren: 80dB Response Time: 250 ms Ultrasonic Frequency: 40KHz Current Consumption: 240~300 mA Maximal Distance Between Control Box and Display: 10m Audible/Visual Distance Indication Distance Area LCD Background Color Sound 1.50 to 1.10m Normal Speed Blue Bi?Bi?Bi? 1.00 to 0.50m Low Speed Purple Bi..Bi..Bi.. 0.40 to 0.1m Stop Red Bi? (solid beeping)