The DTK-8FF 8-outlet SPD (surge protective device) protects AC power and telco/modem/fax lines. Hybrid circuitry provides excellent point of use protection. Up to six transformers or four transformer and four standard plugs, can be protected at the same time. EMI/RFI filtering provides extra protection for sensitive electronics. 8-outlet plug-in AC surge protector with phone/fax/modem protection and EMI filtering.