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33 AMP-Hour Capacity: Extended backup power for uninterrupted operation
Consult your manual or parts diagram to confirm compatibility before ordering
AC Variants (plug-in
or complete chain replacements
Built with advanced rolling code technology
LiftMaster K74-50278 (Elite Q403) Electronic Box Assembly presence-sensor 33 AMP-Hour Capacity: Extended backupReplacement Electronic Box Assembly for SL3000 CSW200 The LiftMaster K74 50278 (Elite Q403) is a genuine electronic box assembly used on select LiftMaster ELITE swing and slide gate operators. It is commonly referenced as Elite Q403 and may also be listed as Q402 depending on the operator configuration and parts breakdown. This assembly is used to restore a damaged or missing electronics enclosure and related internal connections so the operator can
