Price: $8.00

HC-SR04 Ultrasonic Module

Super easy, great price ultrasonic range detection for your project. 
Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit.

Specifications:
Working Voltage DC 5 V 
Working Current 15mA 
Max Range 4m 
Min Range 2cm 
MeasuringAngle 15 degree 
Trigger Input Signal 10uS TTL pulse 
Echo Output Signal Input TTL lever signal and the range in 
proportion 
Dimension 45*20*15mm

Documentation: