A:Answer Hi Linda,
Thank you so much for your inquiry.
We are sorry, but the SRS-XB33 doesn't support USB music playback. It is a Bluetooth-only speaker. If you want to play music, you can use your smartphone and connect it to this speaker via Bluetooth connection.
For Bluetooth and USB compatibility, you may check out the XG500, XP500, XP700, XB60, XB90, XB72, V71, or V13. With the USB port, you’ll be able to plug in a USB, smartphone, or tablet and play music in a range of formats including MP3.
I hope you find this information to be helpful!
- Romeo