★ Output power: RMS 3W THD = 10%
★ Frequency response :150-18000HZ (+ /-3dB)
★ signal to noise ratio: ≥ 80 dB
★ Speaker: diameter 45mm, 4 ohm shielded
★ USB retractable cable
★ Audio Size: 50 50 50mm
★ USB 5V power supply or adapter DC-5V power supply, can not be higher than 5.5v
★ special plug TF card. Retractable cable to the computer, Headphone
★ FM Radio
★ Built-in lithium battery)