Description: Background self-learning function. Active infrared technology with anti-interference self-adjustment capability. The motion radar with a one-way function can save more resources; the 3-D safety light curtain eliminates the need for an additional safety sensor. Features both startup and anti-pinch protection. Multi-technology is utilized for the combination of automatic door opening and safety. These multi-sensors also fulfill several additional functions that can significantly enhance door convenience. Model Number: CNB-235 Application: Hotels/Buildings/Offices/Malls/Hospitals/Cleanrooms, etc. Power Supply: AC/DC 12V~24V Working Temperature: -20~55 Sensor Distance: 2500mm Material: Metal+Plastic Color: Black Package Contents: 1 x Multi- 2 in 1 Door Sensor Only the above package contents are included; other products are not. Note: Light reflections and different displays may cause the color of the item in the picture to vary slightly from the real item. The allowed measurement error is +/- 1-3 cm.