This is a Card Style MP3 Speaker， it can become a SD card and U disk MP3 player and card speaker. With high quality， high power speakers， portable. easily connect your MP3/MP4 to the card speaker， great sound from it would bring you wonderful music feeling!                                    Features            New ang high quality<br>It has high quality sound output<br>Connecting the speaker to your MP3 player or other music player with a cable， you can enjoy the perfect sound created by it<br>Built-in ON-OFF button<br>Built-in volume control<br>The mini speaker can be powered either by AC adaptor or batteries<br>Lightweight and easy to carry， so it can bring more entertainment both indoor and outdoor<br>                                                            Specifications                        Support audio file format           MP3 (up to 320k bps)        <br>          Bit Rate           64 - 320k        <br>          SNR           10dB        <br>          Frequency response           20Hz-20kHz        <br>          Earphone output           10mW (320ohm)        <br>          Support storage           SD / SDHC / USB Drivers (not included)        <br>          Worhing current           150mA - 230mA        <br>          Charging currenr           90mA - 440mA        <br>          Charging Voltage           DC 5-5.5V        <br>          Charging time           2 hours        <br>          Battery life           About 5 hours        <br>          Dimension           90 x 59 x 20 mm / 3.54 x 2.32 x 0.79 in (L x W x H)        <br>          Card-Panel Size           85.8 x 54.8 mm / 3.38 x 2.16 in (L x W)         <br>                                                              Package Includes             1 x Mini Happy Christmas Children Card MP3 Speaker<br>1 x USB cable<br>