How to use bluetooth speaker: Make sure the bluetooth speaker is charged / battery is on after that activate the bluetooth speaker (Each bluetooth speaker has a different button) , connect your speaker with your phone / gadget via bluetooth (Activate bluetooth on cell phone gadget and then press device speaker name) , enjoy your favorite music Features: Speaker with a stylish panel High capacity rechargeable lithium battery Supports variable audio input: Micro sd card usb fm aux With main volume control Specs: Power output: 5w Battery capacity.: 1200 mah 4 inch speaker Playing time.: Up to 4 hours. Bluetooth version 4.2 + Edr Karaoke speaker with microphone included The speaker is equipped with a microphone so that you can use the speaker to sing with your friends and family. Bluetooth 4.0 You can easily connect gadgets or smartphones to bluetooth speakers equipped with this bluetooth connection. Flash drive support. And tf card Bluetooth karaoke speaker with usb slot tf card. You can play the song directly from the flash drive. And your sd card. Subwoofer speaker You don ‘t have to doubt the quality of this speaker’ s voice. The speaker has a clear sound quality and a strong bass with its subwoofer.