VTECH VCS704 ErisStation Conference Phone with Four Wireless Mics Frequency Band: Wireless Microphone Unit: 1921.536 - 1928.448 MHz Base Unit: 1921.536 - 1928.448 MHz Transmission Technology: DECT 6.0 Additional Features: Automatic gain control 2-line backlit display with date and time Wireless microphone battery low indicator; flashing LED Wireless microphone auto power off; when base powered off Connects to / supports one analog line; POTS interface Connection to existing PBX or IP-PBX systems requires an Analog Line Interface Adapter with RJ-11 Connector (NOT INCLUDED) 10 ring tones / melodies; 6 ring levels Eco mode (talk mode) 10 speed dial entries Redial / last number redial Pre-dialing with editing Mute indicator; red LED on base unit and wireless microphones Active call indicator: green LED on base unit and wireless microphones 50 CID log entry (type 1 CID) 50 name / number phone book entries ...