Konftel 300WX Premium Wireless VoIP HD DECT Audio Conference Speaker Phone Call Recorder Music Player w/ Base Station Multiple connectivity options: analog, SIP, computer and wireless DECT and mobile. The battery allows 60 hours of call time, making Konftel 300Wx completely wireless in DECT environments. Also allows connection to mobile phones and computers with the option of connecting the calls. For large and small meetings. OmniSound  superior sound quality with support for HD sound, Supports expansion microphones, Line selector, Conference guide helps you make multi-party calls and store conference groups, SD call recording Record meetings to a memory card, Phone book stores contacts, FULL 2 YEAR WARRANTY