YVC200 Personal USB- & Bluetooth Conference Phone, battery powered, rechargeable. Taking the Office Outside Portable USB and Bluetooth speakerphone enables natural and reliable remote communication no matter where you work. Bring it in your bag and take the office outside! Yamaha’s professional quality DSPs Super wideband audio (Fs 32 kHz) for ample, clear sound 360 degrees and maximum radius 2 m (6.6 ft) microphone pick up range Maximum 88 dB loud speaker volume