*Support formate All BT divices, SD card
**Bluetooth Version 3.0
**Battery 3.7 400MAH Built-in Li-Ion Rechargeable Battery
**Rated Power PO=3W
**Eesolution 55dB
**S/N ratio >=95dB
**Speaker output 4Ω3W,40mm
**Frequency range 100HZ-20KHZ
**Interface AUX/TF/FM
**Charing time 1-2 hour
**Play time 5 hours
**Colors of product 4 colors for choose
**Product Size 255*115*125mm
**Weight 1000g
**Operating distance 10-20 meteters