The QXNYcar reversing radar system is composed of 4 ultrasonic sensors, a digital control box and an LCD display, making it easier to park any vehicle. It automatically detects the distance between the car and the obstacle behind it through a sensor installed on the rear bumper of the car. It helps avoid dangerous and costly collisions that can easily happen behind the steering wheel Features: 1:With the button you can switch between three alarm sounds, voice, beep or mute. 2: There are 4 light bars, which represent the data of each sensor respectively, so that the driver can know the position of the obstacle. 3: The sensor is double-angled and 22MM diameter, which can effectively prevent invalid alarms and facilitate more accurate detection. 4: Blue background light makes viewing data more comfortable and does not affect the driver's sight. 5: The controller box adopts a flip type to ensure that each wire is in firm contact. 6:Automatically start detection when reversing, detection range: 0.3M~2.3M. 7: On the display, there is a number which represents the distance to the nearest obstacle. Thecontroller box adopts a flip type to ensure that each wireis in firm contact. Witha voice switch button, you can switch the real voice, beep or mute. Product List 1 LCD monitor X12 main box X13 Sensor X44 stickers X15 hole drill X16 User Manual X17 power cord X1 Specifications:Front sensor detection range: 0.3M~1.2M RatedVoltage: 12V DCRated Current: 100mA - 300mAUltrasonic Frequency:40KHzOperating temperature of control module: -30 - 80 degrees CelsiusDisplay operating temperature: -20 - 70 degrees CelsiusSensor Diameter:22mmAlarm sound: human voice, beep or muteDigital LCD display(numbers and lights). Helps provide increased safety for paengers, pedestriansand family members who happen to be around moving vehicles