HC-SR04 Ultrasonic Sensor
Power Supply: 5V DC
Quiescent Current: <2mA
Effectual Angle: ﹤15°
Ranging Distance: 2cm – 500 cm
Resolution: 0.3 cm
Output Signal: Electric frequency signal, high level 5V, low level 0V
Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND (VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)