The HSCR04 uses sonar technology to determine the distance to an object. A "PING" is sent out and the returning "ECHO" is used to determine the distince of the object.
SPECIFICATIONS:
	
Power Supply :+5V DC
	
Quiescent Current : <2mA
	
Working Current: 15mA
	
Effectual Angle: <15°
	
Ranging Distance : 2cm – 400 cm/1″ – 13ft
	
Resolution : 0.3 cm
	
Measuring Angle: 30 degree
	
Trigger Input Pulse width: 10uS
	
Dimension: 45mm x 20mm x 15mm