With Sandberg Bluetooth Audio Link you can wirelessly connect your mobile phone, PC, Play Station 3 or other audio device with built-in Bluetooth to an amplifier. Sandberg Bluetooth Audio Link simply connects to an AUX input on the amplifier & then wirelessly receives the music signal via Bluetooth. The built-in battery can be charged via USB (Universal Serial Bus) & gives 12 hours operating time & over 200 hours standby. Can also be used with constant power via a USB (Universal Serial Bus) charger/PC.