Rock out, then roll it up! Multi-function, flexible, completely portable professional piano by MukikiM with 61 standard keys. Features : ♫128 Keyboard Tones ♫128 Rhythms ♫45 Demo Songs ♫Vibrato/Sustain ♫Record & Playback AND OOP recording ♫Teaching Mode ♫MIDI compatible ♫Digital display ♫Tempo control ♫Drum sound function ♫Power saving function activates when not in use ♫Built In Speaker w/auxiliary capabilities(headphones or external speaker) ♫Powered by included rechargeable battery OR USB (cord included!) ♫Completely portable - take it with you and play ANYWHERE! ♫Realistic Sounds Specifications: ♫Keyboard Size (open): 36"x6.5"x.25" ♫Control Panel Size: 4.5"x8.5"x1.3" ♫Rolls up into a box sized: 11"x9"x3.75" ♫Materials: Silicone, plastic ♫Batteries needed: 1x Lithium Rechargeable Battery (included) Package Includes: ♫1-Piano with attached control panel/speaker ♫1-47" USB power cord (wall plug not included) ♫1-Lithium Rechargeable Battery ♫1-User Manual 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.