Grandstream GXP1610,1 SIP,1 Line, no PoE, Black//1 SIP account, 2 line keys, 3-way conferencing, 3 XML programmable context-sensitive soft keysDual-switched 10/100 mbps portsEHS support for Plantronics headsetsUp to 1000 contactsCall history up to 200 recordshttps://www.grandstream.com/products/ip-voice-telephony-gxp-series-ip-phones/gxp-series-basic-ip-phones/product/gxp1610/gxp1615