Product Feature 1.Wireless bluetooth connection,MP3 playback function,mobile power function 2.Efficient smart Bluetooth chip fast connection. Bluetooth effective distance of up to 10-20 meters 3.Break the traditional front-line dual-use, plug the computer only one line to complete the charge. 4.2200MA large capacity lithium battery, standby up to 240 hours, playing time up to 12 hours. 5.Can be an external USB night light fan and other equipment, a multi-purpose machine. 6.Compatible with all kinds of bluetooth devices such as laptop, phone, tablet etc. And is not limited by for IOS Andriod and Win 10 system platform. 7.Support TF card extend play, AUX audio input, breakpoint automatic memory playback, MP3 function audio output, wireless bluetooth connection stereo play,voice calls bluetooth one key to answer and hang up. Product Specification: 1.Bluetooth version: CSR 3.0+ 2.Output power: 5W(RSM) 3.Speaker unit: 53MM magnetic suspension speaker 4.Frequency response range: 50HZ-18KHZ 5.Frequency: 2402-2480GHZ 6.MIC sensitivity: -38db 7.Distortion: