Muro Box gives you the freedom of composing your own melodies and allows you to play a lifetime of memories in one mechanical music box. Muro Box has flexible pins on the cylinder to pluck the comb according to your programmed music. There is no capacity limitation on how many melodies you can upload to your music cloud library. Now, you can create as many playlists as you want to play your favorite melodies for different occasions.   There is no limitation on how many minutes that you can listen to music. But for better machine life and to maintain, it is recommended that you not to use it over 1 hour at a time. When the device is too warm, please turn it off for more than 15 minutes before using it again. By default, the maximum duration/length per song is set up at 30 minutes long to prevent your cell phone overload.   Our product uses WIFI instead of Bluetooth for connecting app and Muro Box, so you can use our app as a remote controller to play the meaningful music for your family even when you are not at home. What’s more, you can enjoy the whole song performed by a music box without keep turning the switch button.