Product specification Power supply (V) 5V DC Current 15mA Measure angle 15deg Distance from 2cm to 4m Product description We are the main suppliers of HCSR04-Ultrasonic sensor module. It is the HC-SR04 ultrasonic distance sensor. This economical sensor provides non-contact measurement functionality from 2 cm to 400 cm with telemetry accuracy of up to 3 mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.