This item is the Lightning and Surge Protection Unit, This Dog Fence/Pet Containment System offers complete protection of your pet fence system (Petsafe, Innotek, Dogtra – all brands), superior to similar devices we have found elsewhere, Specifications: 120VAC, 50/60 Hz, 15 Ampere Rating -- UL 1449 TVSS rating 700 volts -- Single Pulse Energy Absorption: 1200 Joules -- Protection Modes: L-N, L-G, N-G, Loop Protector Specifications: Two wires protected -- Clamping level: 70 volts -- Surge withstand: 18,000A each wire -- Easy spring-clip connections, In the event of a rare catastrophic surge such as a massive direct lightning strike, this lightning Protector disconnects the transmitter:, Specifically designed for use with ALL Electronic Pet Containment Systems, with protection for the AC and the Loop, Increased surge current ratings, The protector has a larger capacity to dissipate surges, Reduced risk of a system failure, Protects the transmitter so it can continue to keep your pet inside his or her designated safety zone, Space-saving design, Better loop connectors, Easier to attach the loop wires to the unit, Power indicator: Easy to see and shows power is on and protection is working, SKU: AGMD328