AC plug.
Any Music Format Stereo The stereo can connect to existing external speakers via RCA output and pair with a device via Bluetooth to access your preferred playlist. Available only from Hammacher Schlemmer, this is the all-in-one stereo that plays music from records, cassettes, CDs, MP3 players, SD cards, USB drives, the radio, or a smartphone via Bluetooth. Ideal for those with music collections that span various forms of media, it plays audio from a pair of three-watt speakers.With a headphone jack and remote control (button cell battery included).