With Sandberg Wireless Audio Link USB, you can wirelessly connect your mobile phone, tablet, laptop or other device with built-in Bluetooth to an amplifier. Sandberg Wireless Audio Link USB 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 using in cars, facilitating wireless and hands-free calls on a mobile phone in addition to wireless music. Power is supplied directly to the device via USB.