DoorKing 1877-010 Telephone Line Surge Suppressor sprocket such as the LiftMaster 312HM

such as the LiftMaster 312HM

30 ft included

Lock Output: Maglock support through NC and COM terminals

Always verify compatibility using your operator manual or parts diagram before purchasing to ensure the proper replacement part

DoorKing 1877-010 Telephone Line Surge Suppressor sprocket such as the LiftMaster 312HMTelephone Line Surge Suppressor for DoorKing Systems The DoorKing 1877 010 Telephone Line Surge Suppressor provides critical protection against voltage spikes and surges that can damage telephone entry and access control systems. Designed for use with DoorKing telephone based controllers, it safeguards communication lines by filtering and grounding transient surges caused by lightning or power fluctuations. Key Features Genuine DoorKing surge