375915 Features: LED digital display with BiBi sound reminder. 4 sensor system， double CPU and advanced chipset to enhanced coverage and detection. Be beneficial 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 installation and operation. With a drill head， convenient to drill hole. Specifications: 1. Rate Voltage: 12V 2. Operating Voltage Range: 9~16V 3. Rate Current: 20~200mA 4. Detecting distance: 0 - 2.5m 5. Ultrasonic Frequency: 40KHz 6. Working Temperature: -30~80°C 7. Display Working Temperature: -20~60°C Parking includes: 1 x Digital Display 1 x Host 1 x 4Pcs probe 1 x Power Cable 1 x 22MM Hole 1 x gum paste 1 x Manual