Mobile phone Speakers With special particular patent in worldwide - expansile resonator construction design .

Dimension: 52.5 x 35.5mm/52.5x 70.mm Net weight: 100g Speaker: 36mm x 2 Input: L/R280mV Power output: 1.7W x 2 S/N: 80dB AMP frequency range: 280Hz - 16kHz Charge voltage: 5V+0.5V Suitable temperature: 0 - 40°C Applicable for MP3, MP4, laptop, PC, MD, mobile phone, and more, all kinds of digital player devices With the intellectual property rights of magnet portable technique Built-in magnet inside the speaker case, that will combine the 2 speakers together, easy to take With special particular patent in worldwide - expansile resonator construction design (extending the space of resonance) The resonator will be expanded while playing, that will increase the low frequency outputting If power off, close the resonator, the dimension will become smaller That will be easy to keep in pocket With currency 3.5mm audio 1.0 tracks inputting Its easy to use With rechargeable lithium battery built in, with protection circuit The user could re-charge the speakers via the USB port The continuous working time is more than 4 hours It has 2.0 audio tracks with powerful volume It will be the best choice for your journey