Best Choice Products 100" Super Gigantic Musical Electronic Keyboard Piano Play Mat with Builtin Amplifier MP3 Plug in The play mat extends 100long and 29 wide allowing more than one child to be played in the Mat can change in between 8 different instruments Features a record/playback option to replay the great creations, and also a volume button to adjust the noise Includes and MP3 output and cord in order to plug in and play your favorite music Recommended for kids 3+yrs & it does require 4AA batteries