Spracht Blunote Pro Bluetooth Wireless Speaker, BlackPortable wireless speaker offers a full-range music playback in MP3 players and professional telephone conferencing through the high-quality, dual MEMs microphones with impedance matching. DSP with noise and echo cancellation allows a natural-sounding voice in Bluetooth-paired cell phone conversations. Compact design fits easily in a briefcase. Wireless speaker's rechargeable, extra capacity lithium-ion battery assures hours of uninterrupted conferencing or music. Music playback is enhanced by innovative, audio compression technology—APT-X by CSR—that produces high audio quality. Mounting: Desktop; Cable Length: 2 ft; Connector/Port/Interface: 3.5 mm Jack; Bluetooth; Output: 4.4W.