Cisco 7937G Conference Station External Mic Kit, 2-Pack (Refurbished)The CP 7937 MIC KIT includes two external microphones that connect to the CP 7937G VoIP Conference Station. The microphones extend voice coverage area and enhance speaker volume output. The CP 7937 MIC KIT is an ideal solution for larger rooms or rooms with above average background noise. Key Features: Quantity: 2 Room Coverage: 30 40 Feet Compatibility: Cisco Unified IP Conference Station 7937G