Grandstream GHP620, 2 SIP,2 Line, PoE, White//2 SIP Accounts, 2 LinesGDMS online device management and provisioning3-way audio conferencing for easy conference callsIntegrated dual-band 2.4GHz & 5GHz 802.11 a/b/g/n/ac (GHP620W & GHP621W only)Includes one 100Mbps network port with PoE (GHP620 & GHP621 only)Swappable faceplate to allow for easy customizationHearing Aid Compatibility (HAC)Enterprise-level protection including secure boothttps://www.grandstream.com/products/ip-voice-telephony/hotel-phones/product/ghp620-ghp621