Search term: Car Parking Sensors, Reverse Rear Assistance, Round Radar, Rearview Buzzer, Sound Alarm Monitor Features: 4 sensor system, double CPU and advanced chipset for enhanced coverage and detection. High sensitivity and low power consumption. With sound alert when the 4 cameras detect dangers. The closer the obstacles, the louder and faster the sound alert. Help to prevent dangerous and costly collisions. Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Descriptions: Detect small children and low walls as well. Anti-freeze and rain proof. Easy and convenient to ins Specifications: Material: plastic, metal Operate voltage: DC 12V 2V Rate current: 20050mA Detecting distance: front: 0.3-0.8mback:0.3-2.0m Detective angle:H: More than 80 degree,V: More than 70degree Working temperature: -20-+70 Centigrades OSD Language: English Main control box size: 90x60x23mm Color: Black Package included: 1 * Main Control Box 1 * Sound Alert Indicator with 5.5M Line 4 * Parking Sensors with 2.5M Line 1 * Hole Saw 1 * Power Cable 2 * Double Side Stickers