Lenovo ThinkSmart bar speaker Purpose-built for meeting room-based video conferencing, this speaker delivers outstanding audio quality in a meeting space where remote attendees feel as if they are in the same room. - Integrated subwoofer - Four integrated beaming microphones with 180° cover - Plug and Play - Can be mounted to a wall or display or used free-standing - On/off, mute, volume and Bluetooth keys - Volume up to 100 dB - Output power: 20 + 20 W with 4 speakers - Integrated DSP for echo and noise cancellation - Speaker frequency: 250 Hz - 20 kHz