The 990LM and CLSS1C-B Surge Protector by Chamberlain LiftMaster is a simple plug in solution to protect your garage door opener or other accessories from an electrical surge from lighting strikes
Safely protects the entire garage door opener system including the AC power line control panel and The Protector System safety sensors
Made to withstand most power surges and lightning strikes
For use with LiftMaster garage door openers from 1994 to present