Universal compatibility: The Garage Stop security sensor beam replacement suitable for 820CB and for Chamberlain Liftmaster Sears Craftsman Gaiden opening device is compatible with 1997 to the present. 820CB is a new version of the gallery door safety 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 safety sensor.Installing these products will not increase functions This product provides security for one gallery 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.<br><br>Specifications: B:Set 1 Colour:As Shown Material:Metal + Plastic<br><br>Package Contents: 1set x chamberlain garage door sensors<br><br>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.