This is a high quality Bluetooth receiver used to transform Bluetooth audio from a Bluetooth source device such as a smartphone or tablet into line level audio that is connected to a Legrand lyriQ music system or any home audio receiver/amplifier. This Bluetooth receiver plugs into a standard electrical outlet for its power source. It also has a USB charging port capable of charging any portable device with its supplied cable up to 1 amp of current. This receiver also supports the A2DP stereo audio profile but also supports the higher end Bluetooth aptX audio profile for CD quality Bluetooth (source device must be compatible to take advantage of this feature).