This product is simple to use, and a Control Port high above a 10US, you can wait for the high output at the receiving port. An output can open the timer can be read when this port goes low timer value for the time ranging be calculated distance. The performance of this module is stable and precise measure of distance. And comparable SRF05, SRF02 Ultrasonic Ranging Module. Module precision, blind spots (2cm) super close, stable distance measurement. Specifications: Material: Aluminum #43;copper Color: Blue Working voltage: DC5V Quiescent current: #xff1c;2mA Level output: High 5V Level output: Bottom 0V Sensing angle: not more than 15 degrees Detection range: 2cm-450cm High precision: up to 0.3cm Test distance #61; (time high * speed of sound (340M / S)) / 2 PCB board size: 4.5*2.0cm Connection mode: VCC, trig (control end), echo (receiver end), GND Package size: 16*8.5*2cm/6.29*3.34*0.78in Package weight: 10g Note: Item color may show sight aberration due to different shooting light and monitor display. Packing list: 1* Ultrasonic Wave Detector