Dance to the tunes of effortless but beautiful audio with the Twenty 2.1 Bluetooth Receiver for iPhone and Android by Griffin Technology. This is an amazing digital amplifier for your speakers which receives Bluetooth or optical audio streaming from your phone, tablet or computer. Setting it up is super easy. You just have to connect your speakers to Twenty, pair your tablets or phone with it and hit the Play button. Alternatively, you can even use the included optical TOSLINK cable to connect the AirPort express or Apple TV physically with the Twenty. There is a sub-out for adding your existing powered subwoofer too. The aluminum volume knob can be weighted for smooth as well as accurate volume adjustment. Don’t compromise with the music experience at home anymore.