Zycoo iSpeaker C20

Telephony Protocol SIP 2.0?iRFC3261?j-Support G.711,G.722,G.723,G.726,G.729 audio codecs;-Support SIP2.0 (RFC3261)and related RFC protocol;-Support Power over Ethernet(PoE);-The DSP integrated echo cancellation and noise suppression can provide excellent voice;-Easy management and configuration from Web interface;-Support encrypted communication;-Online update of software.-Speaker Output 3.5W-Speaker Impedance 4Ohm-Headset 3.5mm standard input/output interface