Avaya B159 Conference Phone<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Full Duplex</li><li>SD Memory card for call recording</li><li>Line Mode Selector; analog， VoIP， Mobile</li><li>Pick up range of 320 Sq. Feet</li><li>Optional B100 Expansion Microphones</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41QxSsrghQL.jpg" noproxy>