Bluetooth v 4.0 speaker is a great tool for conference calls. Metal speaker w/ controls for adjusting volume, play/pause, skipping songs, accepting/rejecting/ redialing phone calls, a built-in microphone & LED status indicator. Compatible with audio devices that has a 3.5 Mm audio jack & Bluetooth technology. Includes a multi-purpose charging/audio cable with USB, micro-USB & 3.5 Mm plugs. Range 10 M/30', playback 10 hours, recharge 2 hours, battery capacity 520 mAh, speaker sound 95 decibels. Complies with CE, FCC. 2 1/4" Diameter x 1 15/16" H
