Green learn button 390 MHz

Works for manufactured between 1993 and 1997 Sears Craftsman, LiftMaster, Chamberlain brand openers with Green smart/learn button 
Compatible with the "Billion Code" series, frequency 390MHz.
Replacement for: Craftsman garage door opener remote 139.53879, 139.53859, 139.53970SRT, 139.5397, 139.53971SRT, 139.53971, 139.53973SRT, 139.53973; 
LiftMaster garage door opener 81LM, 82LM, 83LM; 
Chamberlain garage door opener remote 850CB, 853CB, 856CB;
Also compatible with wireless keypad model number 66LM
Please make sure the garage door opener has a GREEN smart/learn button (on the power head, motor unit attached to the garage ceiling), otherwise it won't work!