It's simple: First, you can play the songs you want in www.wo99.com. Step 2: Open itunes and add the desired accompaniment to the music library. (Note: It must be in MP3 format, and you can't just transfer it. Step 3: Connect your mobile phone, click your mobile phone user name, if it hasn't changed, it should be "Administrator", then select "Music" and press Sync. (It is best to back up the contents of the mobile phone to the computer synchronously in advance. Step 4: Turn on the singing bar, press the small microphone, and click "Sing the song in the mobile phone" to see the accompaniment you want. Hope to adopt! !