With our patented cylinder design and the music cloud library, Muro Box can play infinite songs in just one music box. Now, you can choose or compose your own songs and schedule their play time on its mobile app. There is no limitation of how many playlists you can create and no limitation on how many songs you can put into one playlist.   Please note that Muro Box should be connected to the Internet when you update the playlist or upload your own compositions to the app. Otherwise, the songs stored on the offline playlist can be played without Internet connection!   In addition, we have already downloaded more than 30 offline melodies on your Muro Box. Those melodies include well-known classical music, original music, and children's songs. You can get access to them simply by downloading our app "Muro Box" in App Store or Google Play.   We support both iOS and Android apps. Welcome to download it for free! Attention: Android needs to be 5.0 or newer version; iOS needs to be 11.2 or newer version.   The procedures for the first-time use are as follows. Register an account after downloading our Muro Box app. Connect your Muro Box device with the app on your smartphone via WIFI/mobile's hotspot. Choose the music you want to play on Muro Box from the playlists already in the front page or create your own playlists. When choosing to upload music to create your own playlist, please make sure that your music format is single track midi and the music range can fit the current 20-note Muro Box, which uses a diatonic scale: C3-A5 (C4-A6 in American Standard). If a song contains some notes beyond this range, those notes will be skipped so the music will sound differently.