ITEM NAME:Parking 4 Sensors Car Reverse Backup Rear Buzzer Radar System Sound Alarm CYX Descriptio n Features: 4 sensor system, double CPU and advanced chipset for enhanced coverage and detection. High sensitivity. 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. Detect small children and low walls as well. Anti-freeze and rain proof. Easy to install. A saw drill head included. Specifications: Material: Plastic and Metal Color:Â Black Operate voltage: DC 12VÂ ±2V Rate current: 200Â ±50mA Detecting distance: front: 0.3-0.8mï ¿ ¡?back:0.3-2.0m Detective angle:H: More than 80 degree,V: More than 70degree Working temperature: -20-+70 Centigrades Indicator size: 5.3x 2.3cm Sensor size: 1.9 x 2.5cm (H x D) Main control box size:5.9 x 8.9 x 1.8cm Product list : 1Pc x main control box 1Pc x LED display indicator 4Pcs x 2.5m line parking sensor 1PCX hole saw High quality buy, happy buyï ¼ Parking Sensors LCD LED Display Car Reverse Radar System Alarm Kit.Parking Sensors LCD LED Display Car Reverse Radar System Alarm Kit. 4Pcs x 2.5m line parking sensor. The closer the obstacles, the louder and faster the sound alert. Indicator size: 5.3x 2.3cm. We'd like to settle any problem in a friendly manner.