Features: 1.Professional manufacturing, high sensitivity, high reliability. 2.Made of high quality plastic material,durable in use.Bibi level three heartbeat tone. 3.30CM150CM, the accuracy of centimeter level, accurately indicating the distance of obstacles. 4.Bi.Bi.Bi. beep sounds step by step alarm, the closer the distance is, the faster the alarm sounds. 5.Probe self?test function, prompting the probe abnormal state to avoid reverse collision caused by probe damage. Specification: Features:_x000D_ _x000D_ Bibi level three heartbeat tone. _x000D_ Professional manufacturing, high sensitivity, high reliability. _x000D_ Made of high quality plastic material,durable in use. _x000D_ 30CM~150CM, the accuracy of centimeter level, accurately indicating the distance of obstacles. _x000D_ Bi.Bi.Bi. beep sounds step by step alarm, the closer the distance is, the faster the alarm sounds. _x000D_ Probe self-test function, prompting the probe abnormal state to avoid reverse collision caused by probe damage. _x000D_ _x000D_ Specifications:_x000D_ Condition: Brand New_x000D_ Material: Plastic_x000D_ Color: Black_x000D_ Rated operating voltage: 12V DC_x000D_ Working current: 20 ~ 200mA_x000D_ Detection distance: 20CM ~150CM;_x000D_ Display distance: 30CM~250CM (cm-level display accuracy)_x000D_ Working temperature: -30C~+80C_x000D_ Ultrasonic frequency: 40kHz 1kHz_x000D_ Package Weight: Approx.271g/9.6oz_x000D_ _x000D_ Package List:_x000D_ 1 * Main Control Box_x000D_ 1 * Audible Alarm Indicator_x000D_ 4 * Parking Sensors, 2.3m line_x000D_ 1 * Power Cord_x000D_ 1 * Hole VI_x000D_ 2 * Double-sided Pads_x000D_ 1 * User Manual PackageList: 1 * Main Control Box 1 * Audible Alarm Indicator 4 * Parking Sensors, 2.3m line 1 * Power Cord 1 * Hole VI 2 * Double-sided Pads 1 * User Manual