Energy-efficient monitor with 1.7 "inch screen capacity2. Receiving incoming calls from the door communicator3. SIP v2.0 protocol-based two-way connec..
6 Line AppearancesDual-port Gigabit EthernetYealink Optima HD Voice SupportedUp to 6 SIP accountsFull-duplex hands-free speakerphoneSupports Yealink E..