1.USB:You can download MP3 audio files by connecting to a computer via a MICRO-USB data cable.2.Charging indicator light:The indicator light is always on during charging,and the full light goes out.3.Play indicator light:It is always on during voice playback.4.Support downloading multiple voice files,and the next voice will be played each time it is triggered.5.8M memory,1M can store about 1 minute of audio files;the volume can be adjusted;the product comes with a 3.6V button lithium battery,which can be charged via USB.Model:JR1652Compatible audio and video device styles:speakers, digital-to-analog converters (DAC), playersMemory size:8MProduct name:USB sound module boxSound format:MP3Music time:8 minutesFunction:play music or sound, blessing words, play music or soundBattery:rechargeable 3.6V button lithium battery (included)Colour:WhiteMaterial:Plastic+PCBSpecification: B: Keyboard VersionPackage Contents:1 x USB sound module boxOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.