LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup sea swing gate The internal memory can store

The internal memory can store up to 256 different access codes (2 to 5-digit codes)

This is a replacement Pulley (8"x5/8" 4L Belt)

65000 cards

New Part Number: Q3554 (Old Part Number: 3554)

Max leaf weight: 4400 Lbs

LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup sea swing gate The internal memory can storeLiftMaster LM21XPBB Extended Performance Release Device with Battery Backup The LiftMaster LM21XPBB Release Device is a UL ULC listed normally energized fail safe device designed for use on rolling doors, single slide, center parting level, and inclined track doors. This device is a normally energized fail safe releasing device incorporating state of the art electronic control circuitry. The release device responds to emergency conditions generated