[Compatibility] 41A4373A garage door sensor replacement for liftMaster/chamberlain from 1993 - late 1990's (provided they are already equipped with sensors) They use the Billion code series with green LED lights and are not compatible with red LED light sensors. If one sensor has a green light and the other has an orange light, you'll need the 41A5034 sensors.

[Compatible with models] 41A4373A garage door sensor compatible with models 1240, 1245, 1245-266, 1246, 1250, 1250-266, 1255, 1255-166, 1255-266, 1256, 1260, 1260-166, 1260-266, ATS211R, ATS211 and more. Not all models listed.

[Easy Installation] A detailed user manual is included to help you get set up and install in minutes. TIPS: Be sure power is NOT connected to the garage door opener before installing the safety reversing sensor.

[Package Includes] Detailed installation instructions*1, Sending unit*1, Receiving unit*1, Wire connectors*5 , Wingnut *2 and round head bolt *2

[Quality Assurance] The 41A4373A safety sensors are made with high-quality ABS material. The manufacturer uses the latest automated production lines and follows ISO 9001 standards to ensure strict quality control. If the product is not suitable, please contact us—we will respond as quickly as possible!