Easy to install and program: 41a5034 garage door opener safety beam kit, with bracket, replaceable: 820 CB,G801CB-P,2610459,012381050345,041A5034,801CB,41A5266-1,041-0136. A detailed user manual can help you complete the setup and installation in just a few minutes. Tip: Before installing the safety reverse sensor, please that the garage door remote receiver is not connected to a power source. Update design: 041A5034 safety sensor emits an beam of light on the inside of the garage door. As long as there is an obstacle, the garage door automatically reverse before causing any damage to prevent accidents., Weight: 0.2645547144 pounds, Manufacturer: Xnuiasqe