LM Monitored Through Beam Photo Eye AFC-018 You will need (1) 4"

You will need (1) 4" haven cap per (1) 4" x 4" post

This light will also light up when a transmission has been sent to your gate

patio or fence could use a little something to bring it back to life

75" spacing between the post and gate frame to operate properly

maximum profile dimensions

LM Monitored Through Beam Photo Eye AFC-018 You will need (1) 4"Performance Meets 2016 UL 325 requirements Long Range powerful beam provides reliable performance Sensing distance up to 90 ft. Anti Fogging Lens NEMA 4X rated Wireless network mode eliminates the need to wire between operators in dual gate applications Easy to see LED indicators (2) for instant feedback, emitter power, receiver misaligned or blocked Integrated Diagnostics with Gate Operator Speed Installation Compatible with LiftMaster Gate Operators