Double Sensor Bypass For UL series Liftmaster Gate Operators. Custom made for commercial series gate and overhead door operators only, compatible only with Liftmaster CSL24UL and RSL12UL. Condition is new, shipped economy. Will work with solar powered only units, will work with hardwired units and replaces two monitored safety devices all in one module. You must include a message with your order if you plan to use on a solar powered only unit for the correct module, because i wont know if you dont tell me.