new and welcome types of usb speaker in nice design,top quality 1) Mini USB2.0 speaker2) Multi-color available3) Frequency response: 80Hz-20KHz4) Output power (RMS): 3W×25) Power supply: 5V/1A6) Impedance: 4Ω7) S/N ratio: >80dB8) THD: ≤0.5% 1) LED display2) Support USB,TF card,etc3) Support audio with DC3.5mm jack4) Multi-color available5) Frequency response: 150Hz-20KHz6) Output power: 3W7) Power supply: 5V8) Impedance: 4Ω9) S/N ratio: >80dB   

USB speaker