MS309 is a Party Bluetooth Speaker. Additionally, this speaker also has the extra features of a USB port through which you can play your music by connecting a Pen Drive, an Aux in a slot to connect various other media devices, TF card reader with audio Playback & FM radio. It can be used for outdoor activities, advertising campaigns, and recreational activities. The 3.7v/2000mAh Battery provides sufficient backup time to enjoy your music when there is no power socket around in outdoor conditions.