The Belkin SurgeMaster II Superior Grade surge protectors are designed specifically for mid-range computers, fax machines, laser printers and home entertainment systems. The Superior Grade series provides up to 905 Joules of 3-line AC protection, and solid-state phone/fax/modem protection. Also featured is our innovative, outlet-maximizing BlockSpace design. All models are UL 1449 listed at 330 volts, the maximum protection rating possible. Four child-safety outlet caps are also included. We further support our Superior Grade line with a $15,000 Connected Equipment Warranty.