★ 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
 ★ Built-in lithium battery, calendar, timer alarm, multi-language, which can be accessed MP3, MP4, CD, DVD, computer, IPOD, cell phone music player, FM radio
 ★ TF card straight play music, support synchronous lyrics display.                                                         Color:Black Sliver,Green,Blue,Pink