Clear One 910-158-500-02 MAXAttach Base Unit with 2 Phones Product Name: MAXAttach Base Unit + 2 phones Product Type: Conference Phone Number of Analog Phone Lines: 1 Total Number of Phone Lines: 1 Features Echo Cancellation Expandable Speed Dial Three built-in microphones array with 360 Degree audio pickup up to 12 feet Large loudspeaker for rich, clear conferencing or audio playback Comes with MAX phone unit (4) MAX base unit (1) 25' Cat. 5 cable (1) Telephone cable & Documentation CD & Quick start guide