Chamberlain Garage Door Opener Mini Remote Control Work With Green Learn Button Compatibility 81LM REPLACEMENT REMOTE compatible with LiftMaster and Chamberlain 390Mhz billion code systems. GREEN LED LEARN LIGHT ONLY on the back of the motor.CharcoalOne buttonProgrammableKey chain390 MHzA23 12V Battery 390 MHZ Freq, compatible with LiftMaster operators manufactured from 1993-1997 GREEN SMART/LEARN BUTTON TECHNOLOGY SEARS CRAFTSMAN COMPATIBLE REMOTES: 139.53225, 139.53225SR, 139.53225SRT, 139.53325, 139.53325SRT, 139.53335SRT1, 139.53425, 139.53425SRT, 139.53479, 139.53491, 139.53525, 139.53525SRT, 139.53525SRT1, 139.536141SR, 139.536151SR, 139.536181SR, 139.536191SR, 139.536251SR, 139.53626, 139.536261, 139.536261SR, 139.53627, 139.53627SRT, 139.536271SR, 139.53628, 139.53628SRT, 139.53629, 139.53629SRT, 139.53635. 139.53635SRT, 139.53636, 139.53636SRT, 139.53637, 139.53637SRT, 139.53638SRT, 139.5364, 139.53640SRT, 139.53641, 139.53641SRT, 139.53644SRT, 139.53645, 139.53645SRT1, 139.53645SRT3, 139.53646, 139.53646SRT1, 139.53646SRT2, 139.53648, 139.53648SRT1, 139.53648SRT2, 139.5365, 139.53650SRT, 139.5366, 139.53660SRT, 139.53660SRT1, 139.53669, 139.53669SRT, 139.53678, 139.53678SRT, 139.53755, 139.538, 139.53800SRT, 139.53824, 139.53824SRT, 139.53834, 139.53834SRT1, 139.53834SRT3, 139.53855, 139.53915SRT, 139.53927SRT, 139.53960SRT, 139.5397, 139.53970SRT, 139.53971, 139.53971SRT, 139.53973, 139.53973SRT, 139.53779, and 139.53879. CRAFTSMAN OPERATORS: 53225, 53225SR, 53225SRT, 53325, 53325SRT, 53335SRT1, 53425, 53425SRT, 53479, 53491, 53525, 53525SRT, 536141SR, 536151SR, 536181SR, 536191SR, 536251SR, 536261, 536261SR, 53627, 536271SR, 53628, 53628SRT, 53629, 53629SRT, 53635, 53635SRT, 53636, 53636SRT, 53637, 53637SRT, 53638SRT, 53640, 53640SRT, 53641, 53641SRT, 53645, 53645SRT1, 53645SRT3, 53646, 53646SRT1, 53646SRT2, 53648, 53648SRT153648SRT2, 53650, 53650SRT,53660, 53660SRT, 53660SRT1, 53669, 53669SRT, 53678, 53678SRT, 53779, 53800, 53800SRT, 53824, 53824SRT, 53834, 53834SRT1, 53834SRT3, 53859, 53879, 53915SRT, 53927SRT, 53960SRT, 5397, 53970SRT, 53970, 53971, 53971SRT, 53973, 53973SRTCHAMBERLAIN/LIFTMASTER OPERATORS: ATS211 , CSO, 100SD, 215WD, 220WD, 315WD, 320WD, 710WHC, 711WHC, 1100, 1240, 1245, 1245GMR , 1245LK , 1246 , 1250 , 1255 , 1256 , 1260 , 1260LK , 1270 , 1280 , 2000SD , 2100, 3000 , 4100 , 4600 , 5100 , 7200 , 8100, 8100M CHAMBERLAIN COMPATIBLE REMOTES: 850CB, 853CB, and 856CBLIFTMASTER COMPATIBLE REMOTES: 81LM, 82LM, 83LM, and 84LM.