Lenovo ThinkSmart Bar Sound Bar XL with two satellite speakers The speaker has been specially designed for large meeting room video conferences. - Integrated subwoofer - Four integrated beaming microphones with 180° cover - Two additional microphones for a better range (up to 8.5 m) with a 6.5 m connection cable - 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