Rectangular Bluetooth speaker
1.usb, mini
2.Built in bluetooth
3.support TF card
4.portable ,convinient
1,Material: steel body + pc
2,Output Power: 3.0W
3,Frequency: 100HZ-- 20KHZ
4,Signal &noise ratio: ≥85db
5,Li-ion Output: 3.7V/400Ma
6,Power supplier: rechargeable lithium battery 500mAh
7,Speaker Unit: 3W/4Ω
