Bluetooth in and out for streaming music and listening on wireless headphones. Built-in Stereo Speakers (output power: 5W x 2). Light effect synchronizes with music on speakers and tweeters. AC/DC power including built-in rechargeable battery. The front loading CD/MP3 Player is convenient and sounds great. Bluetooth in for streaming music or other audio and Bluetooth out for listening through wireless headphones. This unit comes with an auxiliary input jack and headphone jack as well as a USB port for playback from a flash drive. Record to cassette from the built-in microphone, radio, CD, USB, aux-in or Bluetooth. Other great features include built-in stereo speakers, 2 VU meters, rotary volume control, 4″ speaker x 2, 1″ tweeter x 2 and light effect that synchronizes with music on speakers and tweeters. Add 10 watts RMS output power plus AC/DC power including rechargeable battery and you get a feature loaded boombox in a retro design for the ages.