BlueTune BT 230 Mobile speakers has multi-functional features and built with state of the art technology. These multi-purpose portable speakers have special features such as Bluetooth connectivity, portability, rechargeable battery and line in with 3.5mm Stereo Audio Cable. The speaker has magnificent design and handy look, so you can take it anywhere easily. The rechargeable battery allows you to play it with convenience for long. There are no technical interruptions and the product has 1 year International Warranty. The charge voltage is 5V (USB Connection) with two hours charge time. The speaker?s battery voltage is 3.7V 280 mAH and the output power is 2.5W. The integration of advanced features makes it a No 1 choice for everyone, who needs quality, ease of use, long and best performance. The frequency response is about 20Hz ~ 20KHz. The speaker has innovative designs and available in different colors by considering the color choice of the customers.