Product details The E18-D80NK Adjustable Infrared Sensor Switch 3-80cm is a combination of a transmitter and receiver in a photoelectric switch sensor. The detection range can be modified based on the requirements. The sensor can detect objects within a range of 3 to 80 centimetres. The Adjustable Infrared Sensor Switch is compact, user-friendly, affordable, simple to construct, and may be widely used in a robot to detect and avoid obstructions, interactive media, industrial assembly lines, and several other scenarios. The signal output changes depending on the obstructions. It stays high when there are no impediments and stays down when there are obstacles. There is a strong light positioned behind the probe to measure the range of 3cm to 80cm. Specifications Work voltage: 5V Working Distance: 3Cm ~ 80Cm Product name: M18 diffuse emission photoelectric switch Output type: Output mode, DC three-wire. Adjustable detection distance: 80cm. Load current: 300ma Shell material: ABS Plastic Work temperature: -25 75°C Dimensions: 18*58mm Type: NPN NO Weight:4g. Connection Red wire:  5V Green wire: GND Yellow wire: Digital output OR Brown wire:  5V Blue wire: GND Black wire: Digital output.