You have a lot of options when it comes to the music you can play through your ULT TOWER 9AC. You can hook up traditional wired components using a single optical digital audio or 3.5mm AUX input. Play your digital library by plugging in an optional USB-A flash drive. One 1/4″ mic input and one 1/4″ mic/guitar combo input lets you add optional microphones and/or a guitar to show off your talents. However, when in doubt, stream your favorite playlists over Bluetooth from your mobile device of choice.Pair your Bluetooth-enabled mobile device to stream audio through the ULT TOWER 9AC. With support for multipoint technology, you can simultaneously connect up to two devices at once. The speaker will automatically switch between devices as they play audio. This lets you share DJ duties or access a friend’s playlist. If you have a Bluetooth Fast Pair-compatible Android device, you can pair to the speaker with just a tap.