Plug-In Transient, Surge, Lightning, & Spike Protection for X-13 and Evergreen Type ECM Motors. To use, simply plug X13PR into motor, then plug motor's harness into the X13PR . (Full instructions with photos in package.) "The most common cause of X-13 ECM Motor failure is damage to the electronics module as a result of poorly conditioned voltage." This unit works with either 120v or 240v GE X-13 ECM motors.