Features: 100% brand new and high quality 4 sensor system, double CPU and advanced chipset for enhanced coverage and detection (0.3-2.5m) Advanced chipset for enhanced coverage and detecting Detect small objects and bars Enable you to prevent dangerous and costly collisions Provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Package Includes: 1x Main Control Box 1x Sound Alert Indicator 4x Parking Sensors 1x Power Cable 1x 22mm Hole Saw 2x Double Sided Adhesive Pad 1x User manual Specifications: Material:ABS Size:Approx.10x2.2x6cm/3.94x0.87x2.36inches Color:Black/Silver/Titanium Gray Rate Voltage: 12V DC Detecting Distance: 0.3-2.5m Ultrasonic Frequency: 40KHz Control Box Working Temperature: -20 - 70 celcius note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.