**Product name:BT2743 China alibaba sales mini **usb car speakers buying online in china
**Model:BT2743
**Color:Can be customized
**Power supplier:DC5V
**Output power:3W(1KHz,THD10%)
**Frequency:90Hz-20KHz
**Signal&noise ratio:≥80dB
**Impedance:4 OHM(Ω)
**Li-ion Output:3.7V~4.2V+0.05V
*Li-ion Input:5V
**Lithium battery:240mAh
**Speaker Unit:36mm
**Case Material:ABS
**Dimensions:Dia66*78mm
Weight:108g
Color:Black,white