Liftmaster 823lm Remote Light Switch Replaces one light switch which allows you to turn on your house light using your remote control. Can be used with the Internet Gateway to control from your smart phone or computer. Compatible with Security+2.0 LiftMaster garage door openers or gate operators and Craftsman AssurLink. All Security+2.0 garage door openers have a round yellow Learn button and two yellow antennas. Fast and easy installation through your router.