◆ Just connect to your smartphone or music player! ◆ Includes demo music with 12 songs. ◆ You can sing your favorite songs by connecting to an external player such as a smartphone! ◆ Microphone stand with adjustable height. (Total length 45cm - 95cm) ◆ Colorful LED lights that sparkle! Requires 3 AA batteries. Operation confirmed. I bought this for my grandchild, but they only tried it out once, so I'm selling it because they don't use it.