Feature: 1. Equipped with a plastic bracket, which makes it easier to fix the sensor position. 2. Ultrasonic module with steering gear can be directly used for various simple obstacle avoidance tests without additional accessories. 3. A control port sends a high level above 10US, then you can wait for the high level output at the receiving port. 4. As soon as there is an output, the timer can be started. When the port becomes low level, the value of the timer can be read. At this time, it is the time of this ranging to calculate the distance. 5. Complete tools, you can operate it yourself, suitable for DIY enthusiasts. Specification: Item Type: DIY Robot Car KitMaterial: PCB, ABS Purpose: Can be used in scenes such as robot obstacle avoidance, object ranging, liquid level detection, public security, parking lot detection, etc. Ultrasonic Ranging Module Parameters: Operating Voltage: DC5V Quiescent Current: Less than 2mA Level Output: High 5V low 0V Induction Angle: Not more than 15° Detection Distance: Approx. 2 ~ 450cm / 0.8 ~ 177.2in High Accuracy: Up to approx. 0.3cm / 0.1in Wiring Mode: VCC, trig (control terminal), echo (receiving terminal), GND Servo Parameters: Torsion: 1.5kg/cm Working Voltage: 4.2-6V Working Temperature: 0℃~55℃ Running Speed: 0.3s/60° Bandwidth: 10 microseconds. Package List: 2 x Ultrasonic Ranging Module2 x Servo2 x Bracket6 x Steering Gear Arm4 x Screw Pack