This Parking Assist System helps a lot when parking your car. It comes with 4 sensors and a buzzer that detects the area behind the vehicle while reversing/parking by ultrasonic. It will alert with audible tones if the system detects an obstacle.

Features:
4-sensor system with audible buzzer alert.
Can be used as a 2-sensor system.
Dual intelligent function together with learning function for vehicle with tow-bar， spare wheel or other protrusions.
Precise detection range.
Self-testing function.
Anti-false alert technology.
All weather design.

Specifications:
Brand: Steelmate
Model: PTS410EX
Input voltage: 12V DC
Operating power: !#!lt!*!2.5W
Operating temperature: -40℃~+80℃
Detection range: 0.1-2.5m / 0.3-8.2ft
Buzzer alarm range: 0.1-1.5m / 1.0-4.9ft
Buzzer SPL: L:80±10dB M: 90±10dB
Package size: 16.5 * 16.5 * 10cm / 6.5 * 6.5 * 3.9in
Package weight: 650g / 23oz

Package List:
1 * ECU
1 * Buzzer Speaker
4 * Sensor
4 * Sensor Wire
1 * Power Harness
1 * Set of Installation Accessory
1 * User Manual
1 * Installation Guide