With the Sandberg Audio Link Bluetooth, you can wirelessly connect your mobile phone, tablet, laptop, or other device with built-in Bluetooth to an amplifier. The Sandberg Bluetooth Audio Link simply connects to an AUX input on the amplifier and then wirelessly receives the audio signal via Bluetooth. The built-in microphone makes it ideal for use in cars, facilitating wireless calls and hands-free calls on a mobile phone, in addition to wireless music. Power is supplied directly to the device via USB.