Universal compatibility: The security sensor beam replacement suitable for 820CB and for Gaiden opening device is compatible with 1997 to the present. 820CB is a new version of the door sensor replacement. It is suitable for your 41A5034 (also known as: 2610459 012381050345 and 041A5034), G801CB-P 801CB 41A5266-1 Your garage bottle opening must be equipped with a sensor.Installing these products not increase functions This product provides security for one door. Easy to install and programmed,Note: Before installing a safe reverse sensor, make sure the garage door opening device is not connected to the power supply. Specifications: A:Set 2 Colour:As Shown Material:Metal + Plastic Package Contents: 1set x garage door sensors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.