Features 1、Provide 2cm-450cm /0.8-in14.8ft non-contact distance sensing function, ranging accuracy up to 3mm / 0.1in. 2、This module can accurately measure distance by using ultrasonic ranging principle. 3、This is a high performance, low cost ultrasonic ranging module. 4、Exquisite workmanship ensures long service life. Easy to replace and use. 5、Input trigger is 10us TTL pulse and output echo is output TTL level signal, proportional to the range. Specification Condition: 100% Brand New Item Type: Ultrasonic Module Material: Semi-conductor Electric Specicication HY-SRF05 Ultrasonic Module Working Voltage DC 5V Working Frequency 40Hz Long-range 450cm /14.8ft Close Range 2cm /0.8in Measuring Angle 15° Input Trigger 10us TTL Pulse Output echo Output TTL level signal, proportional to the range Size 45x20x15mm / 1.8x0.8x0.6in Pins: Vcc Pin: Connect to 5V DC power Trig Pin: Trigger control, signal input Echo Pin: Echo output Out Pin: On-off output GND Pin: Ground connection Package List 1 x Ultrasonic Module