User can't modify the time for unlocking,but you can tell me what time you would like before it shipping.If you leave nothing,We will send the default version(10 o'clock to unlock).
HOW TO RESET FOR NEXT PLAYER.
User only need to adjust the time to other time that can't unlock,it will start work again.
HOW TO MODIFY THE SOUND FILE IN TF-CARD.
1) file path can not be changed.
2) the user's audio must be MP3 format, if not, need to convert it to MP3 format, direct change suffix invalid
3) the file name must be the same as the original file name, for example: the original file name is shipping.If3, then the user's file name must be changed to shipping.If3.