Giant 100" Piano Play Mat for Kids, 24 Keys Keyboard Playmat -Musical Instruments -Melodies -Record -Playback -Demo-mode with Built-In Amplifier for Portable CD/MP3 Plug In - Play Kreative TM Have hours of big musical fun with this children 24 keys giant piano fun dance mat - 100 x 29. Has adjustable volume - 8 selectable musical instrument sounds - makes a great addition to any play area. Record mode with playback - demo-mode with 10 pre recorded demo songs. Built in amplifier for cd/mp3 plug in - high quality, durable design, easy to use. Recommended for children 3 and up! Uses 4 x aa batteries. (not included).