Keyboard Model: 88keys (standard piano key 7 octave +3 key). Package Weight: 4.5 lbs. * Can be rolled up for easy storage in your hand bag or carrying case. * It has many functions like play, recorded. which you can select on the control box. * Power supply: AAA batteries x 4 (not included) /5 voltage DC adapter (Included) * Package Content: 1X 88 Keys Silicone Piano; 1X power adapter; 1X English User Manual.