Support Bluetooth, SD card (maximum support 16GB), hands-free function. Bluetooth maximum transmission distance of 8 meters, support for connecting desktop computers and notebook computers, support for connecting mobile phones.Excellent sound quality, 360 ° stereo surround sound; via Bluetooth connection, you can easily communicate with friends on the phone; Built-in lithium battery for easy travel and party use. Slide to the left or right for playback adjustment (previous or next); volume adjustment (volume up or volume down); USB cable can be used to charge the speaker (the package with a USB cable). SD card jack can automatically decode MP3 and other popular music formats.Compact mini, easy to carry, you can put it in clothes or trousers bag, easy to use.Excellent home theater and screen viewing Using the speakers, stunning stereo effect, perfect sound quality, perfect viewing experience!!!