RockJam 49 Key Keyboard Piano with Power Supply, Sheet Music Stand, Piano Note Stickers & Simply Piano Lessons., BlackThe RockJAM 49 key keyboard piano is compact in design and is the ideal option for those with limited space, looking for portability, or children looking to reach those high notes The RockJAM 49 electronic keyboard can be powered through either batteries or mains power (power supply included) making it the ideal choice for use both in the house and on the move The RockJAM 49 key piano keyboard includes keynotes stickers that are both easy to install