Griffin Griffin Twenty 2.1 Bluetooth Receiver for iPhone and Android - Bluetooth or Optical Audio Streaming to Your Speakers High-quality streaming audio, using AAC / aptX streaming codecs Included TOSLINK cable for AirPort Express/Apple TV and other optical devices Subwoofer output Input: S/PDIF optical, TOSLINK connector and 3.5 mm adapter (included) Outputs: left& right channel connectors; RCA subwoofer connector