Belkin F5C594-TEL MasterCube Surge Protector; 688 Joules; 10k Warranty (Discontinued by Manufacturer) 688 Joule Energy Rating UL 1283 approved EMI/RFI noise filtration UL 497A approved for telecommunication devices (F5C594-TEL only) Includes 6-ft modular style phone cable (F5C594-TEL only) Warranty: Lifetime ($10,000 connected equipment warranty)