... 4.with LCD screen portable laptop mini speaker User ManualFeatures : C350 adopts Japanese sophisticated technology of micro-controller and touch solution which ... or flash drive. Line in support can be used as speaker of MP3, MP4, laptop, iPhone, iPod, DVD, CD, Notebook, mobile phone ... 3dB)3. Signal to Noise Ratio ≥90 dB 4. Loud speaker: external diameter 45mm, Magnetic resistant 4 Ohms 3w5. LINE IN ...