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.

Specifications:
Brand:Steelmate
Model:PTS400EX
Input voltage: 12V
Working power: !#!lt!*!2.5W
Detection range: 0.1-2.5m / 0.3-8.3ft
Buzzer alarm range: 0.1-1.5m / 0.3-4.9ft
Buzzer SPL: 70-90dB
Package size: 16.5 * 16.5 * 10cm / 6.5 * 6.5 * 3.9in
Package weight: 575g / 20.3oz

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