Specifications:1. Rate Voltage: 12V2. Operating Voltage Range: 9~16V3. Rate Current: 20~200mA4. Detecting distance: 0 - 2.5m5. Ultrasonic Frequency: 40KHz6. Working Temperature: -30~80degC7. Display Working Temperature: -20~60degC Features:1. Size of LED display: 9.9 x 2 x 2.6 cm2. Length of cable of LED display: 5m3. Size of main control box: 8.9 x 6 x 2.2cm4. Weight of whole kit: 388g5. 4 sensors6. Advanced chipset for enhanced coverage and detecting7. LED display: digital and 3-color light bar8. Detect small objects and bars9. Enable you to prevent dangerous and costly collisions10. Provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Package:1 x Main Control Box1 x LED Display4 x Parking Sensors with 2.5m Line1 x Power Cable1 x Hole Saw2 x Double Sided Adhesive Pad1 x User manual