THE ULTIMATE BLUETOOTH SPEAKER BUNDLE: This 4" indoor and outdoor speaker produces crisp, loud audio and features a stunning LED light display. It works with all Bluetooth devices and accepts USB memory devices and SD cards for direct playback. EASY TO TAKE WITH YOU WHEN ON THE GO: The music goes with you, always! Our professional party speaker comes equipped LONG-LASTING, RECHARGEABLE BATTERY: Each karaoke speaker comes with a long-lasting, rechargeable battery. When fully charged, you�ll get approximately 5 hours of use out of our wireless speakers with Bluetooth (charging cable included). WE TAKE GOOD CARE OF OUR CUSTOMERS: We�re confident you�re going to love the quality and functionality of this loud Bluetooth speaker. You have 30 days to put it to the test. If you don�t love it, we�ll take it back for a full refund.