This LiftMaster 971LM remote control transmitter operates one LiftMaster, Chamberlain, Sears or Craftsman garage door opener unit manufactured 1997 through April 2005. Programming instructions are included along with the visor clip for your convenience. The rolling code Security + technology makes this system extremely secure. The operating frequency of this item is 390Mhz and is compatible with the keyless entry keypad 976LM. If you are currently using any of the following remote control transmitters, you will be able to use the 971LM:
LiftMaster - 970LM 974LM 973LM 972LM 96LM 91LM
Chamberlain - 956CB 953CB 950CB
