Features: Working Voltage: 5V(DC); Static current: Less than 2mA. Ultrasound is used to detect obstacles and steering gear is used to rotate angles for omni-directional detection. Ultrasonic: HC-SR04; Sensor angle: Not more than 15 degrees High precision: Up to 0.3cm Stall Torque(4.8V no load): 1.98kg/cm Any problem, please contact our store without hesitation. Honor to serve you Discounted at only: US$ 10.17 
