Special attention: Please ensure that the installation direction of the sensor is parallel to the ground and the direction indicated on the back of the sensor is correctly facing upwards. Otherwise, there may be issues with sensor sensing. Specification: 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 Features: 1. Size of Sound Alert Indicator: Φ4.1cm x 1.6cm 2. Length of cable of Sound Alert Indicator: 2.5m 3. Size of main control box: 8.9 x 6 x 2.2cm 4. Weight of whole kit: 0.33kg / 0.3kg 5. 4 sensors 6. Advanced chipset for enhanced coverage and detecting 7. Detect small objects and bars Note: The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom’s policies and EU Product Safety and Compliance laws.