The package includes an infrared transmitter photocell and an infrared receiver photocell, both enclosed in a durable plastic box equipped with a high-power infrared filter. These photocells can be attached to a post by welding or screwing, or directly mounted on a wall using the supplied plugs and screws. Additionally, the connecting cables can be routed through the bottom of the box for a seamless installation.Technical Specifications: Working Voltage: DC/AC - 12-24V Working Current: Transmitter: ≤30mA; Receiver: ≤50mA Infrared Wavelength: 890nm Operating Distance: ≥12M Adjusting Angle of PCB: ±90° Receiver Relay Contact Output: Max. 1A at 24V DC Operating Temperature: -20℃~+60℃ IP: IP54 Includes: 1x Transmitter Photocell 1x Receiver Photocell 6x Self Tapping Screws 6x Expansion Plugs 2x Post Screws Compatibility: 4 Wire Connection Not suitable with BUS systems