HQRP High Power 48V 1A POE/Power Over Ethernet Injector IEEE802.3AT Standard for Cisco Unified IP Phones: 7911G / 7931G / Conference Station 7937G / 7942G plus HQRP Coaster HQRP&reg; POE Power Supply Injector plus HQRP&reg; Coaster; POE adapters use IEEE802.3AT standard; Input: 100-240VAC, 1.4A 50/60Hz; Otput: 48VDC, 1A; Cable Connectors: RJ-45; 200 days warranty!