High :Waterproof distance module has high measurement accuracy and strong anti-interference .The module has a variety of modes can be modified manually, suitable for testing and teaching experiments in different occasions.Application: Horizontal distance messurement,Obstacle avoidance, automatic control, control, Security, industrial control.Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions. Please note the device is waterproof, but it couldn't work underwater.With a waterproof sealed emitter. This sensor is suitable for outdoor applications such as car reversing sensors, security alarms, industrial inspection, etc.Working voltage: DC3.0-5.5VWorking current: less than 8maProbe frequency: 40KHZLongest range: 600cmNearest range: 20cmLong-distance accuracy: 1cmResolution: 1mmMeasuring angle: 75 degreeInput trigger signal: TTL above 10us, serial port transmit ox55Wiring : 3.0-5.5 (positive supply) Tng (control terminal) , (output terminal) TX, GND negative supply.Product size: 42 x 29 x 12mmColour:blue+blackMaterial:abs+metalPackage Contents:2 * -SR04M sensor2 * probeOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.