... Red,Blue,silver,Black 2.Use:Mp3/Cellphone 3.CE,RoHS TF Card DC5V Sound System 2. ... DC5V Buil-in Li-ion Battery2. Distorition: ≤ 0.1%3. Frequency Response: 90HZ-20KHZ4. Special Features: Mini,Portable, ... 60 X 60X 50mmPower supplier:USB 5V±0.5VOutput (RMS):3 WColor:Black, Red, Blue etcSpeaker units 36mm 4Ω ... the products perfect by listening to consumer feedback.3. Accept the most advanced payment .We can ...