SNOM 821-BK SNOM IP PHONE BLACK 2346snom VoIP telephone3.5 Inch TFT color screen320x240 pixelsOpen VPN phoneMicrosoft Office Communications Server 2007 readyCTIreadyWLAN USB adaapter ready supporting 802.11b/g/nG.711u, G.711a, G.722, G.723.1a, G.726, G.729AB, GSM 6.10, iLBCAddress book transfer250 address book entries4 Programmable keysCall managementRemote call monitoring5 Way conferencingFull duplex wideband audioFull duplex handsfreeMultiple ringtonesHeadset RJ4P4CUSB 2.0 full/low speed host interfaceEthernet RJ45Power supply included