SR04M is a waterproof ultrasonic sensor, with the same functionality and operation as the HC-SR04. This sensor has the transmitter and receiver in the same packaging and also has built-in anti-jamming (interference suppression). Version 2.0
Spesification : - Working voltage: DC 3.0V-5.5V - Working current: less than 8mA - Probe frequency: 40kHz - Detection angle: <50 ° - Measuring range: 4 to 5 meters