Compatibility: The 41A4373A sensor works with for and for openers from 1993 to the late '90s and supports for residential and commercial ATS models. (provided they are already equipped with sensors)Upgrade: Made of high-quality ABS, the 41A4373A door sensor is rigorously tested for durability and reliability. It features a label for visibility in industrial settings and has a 30-ft operating range.Installation: The 41A4373A(infrared eye)safety sensor features a center hole for bolt mounting to a bracket, allowing quick setup. Note: Turn off the opener's power before installation!Includes:Each sensor has a green light and center bolt for alignment. The set includes a sender, receiver, wire connectors, no brackets included.NOTE!: This is a , not-original. names are for reference only. We aim to provide high-quality products.Color:BlackMaterial:plasticPackage Contents:2 * sensor1 set * accessoriesOnly 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.