Using your Digimon Adventure D - 3 is easy! First, charge the rechargeable battery fully before your first use. Once charged, turn it on and start your Digimon adventure. As you play, you'll hear the cool dialogue and BGM from the show. To play these sounds manually, just switch to the playback mode. When it comes to compatibility, you can connect your D - 3 with other past releases and even other D - 3 devices for battles. Remember to keep your device in a dry and clean place. Avoid dropping it or exposing it to extreme temperatures. If the screen gets dirty, use a soft, dry cloth to gently wipe it. Have fun with your Digimon adventure!