Enjoy responsive ambient lighting with your music with the Sony GTKXB90 Bluetooth Speaker. Its built-in LED lighting will adjust with the beat of your music while its three 2.36 inch tweeters and two 7.09 inch woofers play your music of choice via the USB port, stereo RCA input, or Bluetooth; NFC is also onboard for quick Bluetooth connectivity. With its built-in carry handle and up to 16-hour battery, you can take the party nearly anywhere. Push the EXTRA BASS button to add additional low-end power to your music. It is designed to reinforce bass lines to create deep, punchy bass.