Description The auto parking sensor features advanced chipset, able to detect small objects, keeping safe when parking. The car backup alert is attached with power cable, 2.5 meters long, meeting different demands. The auto rear alert enable you enable you to prevent dangerous and costly collisions. The parking sensor set is easy to install and remove, no special tools required. This car parking alarm is a perfect gift for your family and friends who drive cars, making them park safer. Specification Color: show as picture. Size: Alert indicator: 4.1cm x 1.6cm. Main control box: 8.9 x 6 x 2.2cm. Power cable(length): 2.5m. Rate Voltage: 12V. Operating Voltage Range: 9~16V. Rate Current: 20~200mA. Detecting distance: 0~2.5m. Sonic Frequency: 40KHz. Working Temperature: -30~80C. Display Working Temperature: -20~60C. Package included: 1 x Main Control Box. 1 x Sound Alert Indicator. 4 x Parking Sensors with 2.5m Line. 1 x Power Cable. 1 x Hole Saw. 2 x Double Sided Adhesive Pad. 1 x User manual.