3 VoIP (SIP) accounts.
Support up to 20 groups multicast functions.
LEDs and function keys embedded design, LEDs reflects the device work status, function keys can be used to adjust the volume, broadcast IP and a key to restore the factory values.
Built-in microphone and external 3.5mm microphone interface can be switched freely.
Support remote web management and maintenance, such as account maintenance, software upgrades, the volume control.
POE power supply (802.3af)