Garage Door Opener Remote Control for 371LM 372LM 373LM Liftmaster Chamberlain Sears Craftsman with Purple Learn Button

Garage Door Opener Remote Control for 371LM 372LM 373LM Liftmaster Chamberlain Sears Craftsman with Purple Learn Button Before purchase, please check your garage door opener.The opener in your garage MUST have a PURPLE button on the back otherwise this will not work. ? It works with Liftmaster Chamberlain Sears Craftsman garage door opener manufactured in 2005-2011 with Purple Learn Button Version. ? Works for part numbers 950D, 953D, 956D, 370LM, 371LM, 372LM, 373LM, 973-315LMU, 374LM, 139.53752, 139.53753, 940D, 377LM. ? TRUE 4-button supports up to 4 different Security+ 315 MHz rolling code encryption devices. ? Sliding cover protection, no more accidental press in pocket or purse ? Small & lightweight portable keychain style, also can be used as visor clip type. ? Programming instructions included, battery is also included.