DITEK s DTK-8FF eight outlet SPD (Surge Protective Device) protects AC powerand 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.