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