With a waterproof sealed emitter. This sensor is suitable for outdoor applications such as car reversing sensors, security alarms, industrial inspection, etc Working voltage:5V, Static current:5mA, Working current: 40mA Working range: 25cm-4M, Working frequency: 40KHZ, Detecting angle: 70 degree Application: Horizontal distance messurement,Obstacle avoidance, automatic control, Traffic control, Security, industrial control Specification Working voltage: DC 5V Static working current: 5mA Working current: 30mA Acoustic emission frequency:40KHz Wiring:+5V(positive); Trig(control); Echo(receive); GND(cathode) Connection with arduino: 5V:5V Suply Trig:D12 Echo:D13 GND:GND