1Professional manufacturing, high sensitivity, high reliability. 2Made of high quality plastic material,durable in use.Bibi level three heartbeat tone. 330CM150CM, the accuracy of centimeter level, accurately indicating the distance of obstacles. 4Bi.Bi.Bi. beep sounds step by step alarm, the closer the distance is, the faster the alarm sounds. 5Probe self-test function, prompting the probe abnormal state to avoid reverse collision caused by probe damage.Features:Bibi level three heartbeat tone.Professional manufacturing, high sensitivity, high reliability.Made of high quality plastic material,durable in use.30CM~150CM, the accuracy of centimeter level, accurately indicating the distance of obstacles.Bi.Bi.Bi. beep sounds step by step alarm, the closer the distance is, the faster the alarm sounds.Probe self-test function, prompting the probe abnormal state to avoid reverse collision caused by probe damage.Specifications:Condition: Brand NewMaterial: PlasticColor: BlackRated operating voltage: 12V DCWorking current: 20 ~ 200mADetection distance: 30CM ~200CM;Display distance: 30CM~250CM (cm-level display accuracy)Working temperature: -30C~+70CUltrasonic frequency: 40kHz 1kHzPackage Weight: Approx.271g/9.6ozPackage List:1 * Main Control Box1 * Audible Alarm Indicator4 * Parking Sensors, 2.3m line1 * Power Cord1 * Hole VI2 * Double-sided Pads1 * User Manual