usb mini speaker 1.Support TF card, SD card, USB 2 led light 3,connect mp3,computer etc. 4.good for promotion... usb mini speaker1) AC100-220V, 50/60Hz, DC5.5V±5%. With Remote control2) Output: RMS 4Ω (3W+3W)THD=10%3) FM radio frequency response: 150-18000Hz4) Signal and noise ratio of power amplifier: ≥80dB5) Rechargeable Li-ion Battery: 3.7V / 800mA6) Loudspeaker: 2.5inch (external diameter ...
