STINGER 61LM (390LMD21K) LIFTMASTER 61LM COMPATIBLE ONE BUTTON REMOTE. Manufactured by Transmitter Solutions. Compatible with LiftMaster 61LM One Button Remote. Works with all older LiftMaster machines that have 9 DIP Switches.
DOES NOT WORK WITH OLDER OPENERS THAT HAVE A YELLOW, WHITE or GRAY LEARN BUTTON ON THE MOTOR UNIT!
