The package list for the 4/6/8 sensor products is shown in the following image NOTICE:you can choose different color combinations, such as: 8 sensor products, you can choose Black 2, White 2, Red 2 ... If you need to change, leave us a meage when you submit the order. QXNY reversing radar can help you park easily and eliminate danger! QXNY reversing radar can help and remind you to avoid the above dangers! Product special: Features 1: The display has 2 numbers, which respectively represent the closest distance to the obstacles in front of the car and behind the car! Features 2: The display has 3 buttons, which can adjust 4 alarm sounds (buzzer/voice/mute/buzzer+voice) and the size of the alarm volume Features 3: The display cable is separated, which is easy to install Specification: 1: Rated voltage: 12V DC 2: Rated current: 100mA - 300mA 3: Ultrasonic frequency: 40KHz 4: Control module operating temperature: -30 - 80 degrees Celsius 5: Display working temperature: -20 - 70 degrees Celsius 6: Sensor diameter: 22mm 7: Installation method: drilling 8: Detection distance Behind the car: Rear 0.98ft~7.54ft , Front:0.98~2.6 ft We specialize in the production of reverse radar, so we know how to make good sensors 4 Sensors 6 Sensors 8 Sensors