Miroad Mini Sport Bicycle Speaker Support 4GB TF Card Blue is personal stereo with clear， nature sound. It could be hold by a small palm and have music play， Line In， FM function.                                    Features            High-textured aluminum metal surface facilitate outdoor， indoor use<br>Built-in Hi-Fi high-quality and high-efficiency speaker monomer， you can still hear heavenly music even outdoors<br>Built-in high-capacity rechargeable battery， support long play<br>You can continue to enjoy the heavenly music when using headphones<br>to listen music or listen to the radio， it will automatically turn off the loudspeaker， not accessible to anyone else<br>Headset， USB connector， FM radio antenna， Line IN and charging are use the same jack wich make the product more beautiful and simple<br>Support MP3 / WMA format， building in large capacity memory to store number of music files<br>Support line in function， receiving notebook or other audio source to amplify the power<br>                                                            Specifications            Loudspeaker output    THD + N = 0.15% @ 1.5W SNR = 94db @ 1.5W    <br>Earphone output    THD+N=0.6% @ 32Ω SNR=92 db@32Ω    <br>Play time    10 ~ 22hours with loudspeaker (depend on the volume); 70 hours with earphone    <br>Charge time    USB charge: 7 hours USB (5V / 1A) AC transformer<br>charge: 4 hours (Optional)    <br>FM    87 - 108MHz    <br>Storage    2G， 4G， 8G or TF Card    <br>Interface transfer    USB 2.0 Full speed， FAT16 / FAT32 file system    <br>Work temperature    -18℃ - +80℃    Dimension    3.46" x 1.38" x 1.38"    <br>Weight    132g    <br>Color    Blue    <br>                                                            Package Includes            1 x Miroad Mini Sport Bicycle Soundbox Loudspeaker Support 4GB TF Card Blue<br>2 x Strap<br>1 x Bag<br>1 x Earphone<br>1 x USB Cable<br>1 x Power Cable<br>1 x String<br>