Parking assist is an ultrasonic distance monitoring sysytem. It electronically detects the area infront of your vehicle while parking￡? and alerts you with audible tones if the system detects an obstacle. The system will show the accurate distance in meters or feet.This product is a 4-sensor front parking assist system for front bumper protection. <br>With the help of our parking assist system￡? you can enjoy a convenient and easy parking experience. <br><br><strong>Features:</strong> <br>4-sensor system with audible buzzer alert. <br>Can be used as a 2-sensor system. <br>Self-testing function. <br>Anti-false alert technology. <br>All weather design. <br><br><strong>Specifications:</strong> <br>Brand: Steelmate <br>Model: PTSF410EX <br>Operating voltage: 9-16V DC <br>Operating power: !#!lt!*!250mA <br>Operating temperature: -40??~+80?? <br>Detection range: 0.3cm-0.9cm / 1.0ft-3.0ft <br>Buzzer SPL: 70-90dB <br>Package size: 16.5 * 16.5 * 10cm / 6.5 * 6.5 * 3.9in <br>Package weight: 710g / 25oz???? ? <br>? <br><strong>Package List:</strong> <br>1 * ECU <br>1 * Buzzer Speaker <br>4 * Sensor <br>4 * Sensor Wire <br>1 * Power Harness <br>1 * Set of Installation Accessory <br>1 * User Manual