With this KB-76 high performance Bluetooth speaker, you can enjoy music as you like. It supports an external TF card and can directly play music from the TF card. The compact size makes it convenient to carry anywhere. Designed with a DC / TF card slot. Built-in rechargeable 180mAh lithium battery. Can work for 1~2 hours. Supports MP3 music format. Lightweight for easy carrying. You may use this speaker without Bluetooth simply use the stereo speaker cable supplied.