Features: USB Rechargeable, with built-in 1200mAh lithium battery, usually it takes about 2 hours to be fully recharged and it can be used for 6 to 8 hours when it\'s full of power. Nice sound pick up, noise cancelling, a great option for KTV singing, car singing, family singing and party singing, etc. Wireless handheld microphone, ergonomic design, comfortable to hold, easy to use, convenient to operate. BT connection, you just need to connect your phone with BT, and then open the singing APP on your phone. It can be used as your speaker, audio player and recorder, very multi-functional.