Conference Phones - Poly (Plantronics) - Yes - Headset with cable - PC - JACK 3,5 mm - Omnidirectional microphone (OMNI directional) - 150 - JACK 3,5 mm - External power supply/injector - PoE, Class 2 - PoE, Class 3 - Built-in battery - 3,0 m / 6,0 m diameter