Brand: Osepp. MPN: HC-SR04. Key Features: Operating Voltage: 5V Working Current: 15 mA Distance Range: 2cm to 400cm 100% Arduino Compatible An ultrasonic transmitter and receiver sensor all in one. OSEPP Ultrasonic Sensor Module Source Code can be found on OSEPP s website. Item Specifics Package size: 5 x 4 x 1.