Features:
Working Voltage : 5V(DC) 
Static current: Less than 2mA. 
Output signal: Electric frequency signal, high level 5V, low level 0V. 
Detection distance: 2cm-450cm. 
High precision: Up to 0.3cm 
Sensor angle: Not more than 15 degrees. 
Input trigger signal: 10us TTL impulse 
Echo signal : output TTL PWL signal 
Mode of connection: 
1.VCC  2.trig(T)  3.echo(R)  4.GND 
Use method: Supply module with 5V, the output will be 5V while obstacle in range, 
or 0V if not.The out pin of this module is used as a switching output 
when anti-theft module, and without the feet when ranging modules.

Specifications: 
Color: Blue & Silver
Item size: 44*20*15mm
Net weight: 11g
Package weight: 18g

Packing content:
1 x Arduino Ultrasonic Module HC-SR04 Distance Sensor