Product Name: Wireless Car Backup Sensor System with 4 Parking Sensors Wireless LED Distance Display with Sound Warning for Auto SUV Vans RV Trailer Backup Parking Sensor Radar System Product Specifications: Rated voltage: 12V DC Rated working range: 10.5V-16V DC Rated current: 100mA-300mA Detection distance: 0.3-2.0 meters Ultrasonic frequency: 40KHz Control valve operating temperature: -30-80 degrees Celsius Display working temperature: -20-70 degrees Celsius Sensor size: 25x19 (D x H) Main control box size: 90 x 60 x 23 mm Main control box weight: 63 g Products include: Center control box x 1 Wireless LED display x 1 Car park assist sensor x 4 22mm hole saw x 1 Power cord x 1 12V cigarette lighter power cord x 1 3M sticker x 2 User manual x 1.