Features: 100% brand new and high quality It can provive increase safety for you and your family,it also can prevent dangerous and save the collision cost. Accurately detect the position and distance of obstacles. Parking sensors are proximity sensors for road vehicles designed to alert the driver of obstacles while parking. These systems use either electromagnetic ultrasonic sensors. Rear sensors may be activated when reverse gear is selected and deactivated as soon as any other gear is selected. Detection distance: 0-2.5m. Package Includes: 1x Parking Sensor Specifications: Material:ABS Size:Approx.30x2.3cm/11.81x0.95in Color:Black,Red,White Nominal Voltage: 12V Operating Voltage range: 9 ~ 16V Rated Current: 20 ~ 200mA Cable Length: 0.2m Detection Distance: 0-2.5m Ultrasonic Frequency: 40KHz Operating Temperature: -30 ~ 80 Operating Temperature display: -20 ~ 60 Net Weight:100g note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.