Rock out then roll it up! Rainbow colored flexible completely portable piano by MukikiM with 49 standard keys. Features : ♫Play-By Color song booklet ♫Multiple Keyboard Tones ♫Multiple Demo Songs ♫Echo/Sustain ♫Record & Playback ♫Built In Speaker w/auxiliary capabilities(headphones or external speaker) ♫Powered by USB (cord included!) OR batteries ♫Completely portable - take it with you and play ANYWHERE! ♫Power saving mode activates when not in use ♫Realistic Sounds Specifications: ♫Keyboard Size (open): 27.75 x5 x.25 ♫Control Panel Size: 3.25 x6 x1 ♫Rolls up into a box sized: 6.25 x8.5 x3.25 ♫Materials: Silicone plastic ♫Batteries: 4x AAA (not included) Package Includes: ♫1-Piano with attached control panel/speaker ♫1-41 USB power cord (wall plug not included) ♫1-User Manual ♫1-Song booklet Notes for usage: ♫Due to the soft silicone that the keyboard is made of there are times when compound sounds are produced due to cross-feedback or vibrations registering on adjacent keys. This is normal for such devices and is not indicate a faulty or malfunctioning product.