front ultrasonic parking sensor; size: φ126125mm in specification, with a horizontal installation distance of 3.9 - 4.2m from the stop line and a vertical installation height of 2 - 3m (recommended 2.5 - 2.8m); Integrates ultrasonic probe and indicator light, collects parking space status data, controls indicator light display, has anti-interference algorithm, seven-color LED display, supports remote upgrade, and communicates via RS485; detect the parking space status.