Replacement for Sears Chamberlain LiftMaster Craftsman Garage Door Opener Remote Transmitter with Green Learn 2 Button 390 Mhz Compatible with 81LM 82LM 83LM

390 MHZ Freq, compatible with Liftmaster Sears Chamberlain Craftsman operators manufactured from 1993-1997 GREEN SMART/LEARN BUTTON TECHNOLOGY Compatible remotes: 81LM 82LM 83LM 84LM 850CB 853CB 856CB 139.53879 139.53859 Specifications: Material: Plastic Color: Green Frequency: 390 MHz Codes: Features Liftmasters patented rolling code technology Dimensions: 3.0 x 1.5 x 0.6 inches Open/Close garage door without keys or remote Feature Highlights: Easy to program and use Small & lightweight portable keychain style Latest RF technology ensures better range TRUE 2-button supports up to 2 different Security 390 MHz rolling code encryption devices Use one common CR2032 3V lithium coin battery each remote LED indicator illuminates when transmitting, also it will flash during transmitting when battery is low. Compatible with most standard Liftmaster, Craftsman and Sears garage doors featuring the Green Learn button, these easy-to-program remotes support three, long-range encrypted frequencies, feature a sliding protective cover so there’s no accidental button presses, and attach to your keychain for quick, easy convenience. 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,