Features:<br> 1. Powerful stereo speakers deliver outstanding， vibrant sound.<br> 2. Enjoy smooth， seamless operation from phone call to audio playback. 3. Compact design and rechargeable battery provides hours of music， anywhere.<br> 4. Bluetooth technology streams music with the freedom of no wires or docking stations.<br>  Compatible with:  1. Smarphone\/ tablet\/ symbian\/ ios\/ android\/ windows mobile<br> 2. PC: Windows2000， windowsXP， windows vista， win7， win8， mac os x v10.6 &amp;quot; snow leopard&amp;quot;， os x v10.7 &amp;quot;lion&amp;quot;， os x v10.8 mountain lion.<br> Specifications:<br>          General Specification             Brand         Gronnfico             Model         G108             Color         Sliver， Black             Dimensions         8.7x2.8x1.8(l*h*d)           Technical Parameters             Battery         Rechargeable lithium-ion 1000mAh             Play time         Up to 4 hours at max volume             Voltage         DC 5V             Driver Unit         40mmx2 at 4 ohms             Speaker output         3Wx2(1khz&amp;le;2% THD)             Frequency Response         50Hz-16KHz             Bluetooth Version         2.0            Transmission Range         33 ft   <br> Package  Included:<br>                   1&amp;times; Gronnfico G108 Speaker             1&amp;times; USB cable             1&amp;times; Aux line in cable             1&amp;times; Storage bag             1&amp;times; Manual