* Number of Receptacles: 8 x NEMA 5-15R * Surge Energy Rating: 3600J * Built-In Automatic Shutdown: In the event that the surge/spike exceeds the suppression capabilities of the unit, the CyberPower surge suppressor will safely shut itself down to protect all connected electronics. * EMI/RFI Shielding: Provides shielding against electromagnetic interference & radio frequency signals. Most commonly, this is used to prevent line noise or humming that occurs over telephone lines or stereo electronics.