SurgePro AC surge protectors are designed for service entrance or subpanel locations. Each provides small, easy to install surge protection for the entire home or office. The protectors consist of multiple metal oxide visitors with internal thermal and overcurrent protection. An LED indicates the proper function of the protection elements. The THQLSURGE conveniently connects inside the GE Powermark load center, directly onto the bus, like a circuit breaker, providing direct protection for the entire panel and all attached loads.