Welcome to our shop! This is a set of transmitter and receiver in one photoelectric sensor. It has a detection distance that can be adjusted according to your requirements. The sensor is small, easy to assemble, and easy to use. It is suitable for robot obstacle avoidance, line tracking, and many other applications. It can be used in various scenarios such as the production line of automatic counting equipment goods, multi-reminder systems, and maze robots. Specifications: Model: E18-D80NK Electrical characteristics: - Voltage: 5VDC - Current: 100mA - Detection distance: 3-80cm Size: - Diameter: 18mm / 0.71in - Sensor Length: 45mm / 1.77in - Lead Length: 73cm / 28.7in Weight: 28g Package included: - 1 x Infrared Sensor Switch 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.