VTech VCS702 ErisStation DECT 6.0 Conference Phone with Two Wireless Mics using Orbitlink Wireless Technology NOTE: This Device does not work with VOIP. Includes 2 DECT 6.0 Wireless microphones and 1 central fixed microphone. 2-line Backlit display with date and time saves up to 50 CID entries and 50 Name/number phonebook entries. Central full-duplex speakerphone in base allows callers to speak and be heard at the same time, just as they would in a face-to-face meeting. Magnetic Charging bays built into the base keep Wireless microphones keep the microphones together and ready for the next call. Wireless microphones feature up to 70 hours of battery life with 8 hours of talk time.