Features: This is a set of reverse system parts for vehicles to ensure drivers' backup parking safety. Helps provide increased safety for passengers, pedestrians, and family members who are near the moving vehicle. Includes 4 radar sensors with high sensitivity to ensure traffic and personal safety. Equipped with a digital colored LED display (numbers and lights). Features a self-inspection system that automatically checks for abnormal conditions to help avoid reversing collisions. Comes with a drill bit for convenient hole drilling. Easy installation and operation. Specification: Material: Plastic Radar Color: Black, Red, White, Silver, Blue (Optional) Working Voltage: 12V DC Detecting Distance: 0.3 - 2.5m Voice Broadcast: English Package Weight: 376g / 13.3oz Package List: 1 x Monitor 1 x Receiver 4 x Radar Sensors 1 x Hole Saw 1 x Power Cable Note: Easy to install, but professional installation is highly recommended. Please note that the new or old version of this product may be shipped randomly. Please ensure you are comfortable with this before placing your order.