School Orchestra Piano Mat Supplier in China Offers School Orchestra Piano Mat, 17 Keys, 7 Built-in-demos, Record Mode, Play Back Mode, Demo Mode, Play Mode. Touch sensitive Adjustable volume 7 Built-in-demos 17 keys 6 instruments to change tone 4 modes to select: record mode, play back mode, DEMO mode, play modeInformation: Battery: 3 x 1.5V âAAâ (not included) Package Size: 47 x 7.5 x 33 cm Mat Size: 120 x 46 cm Item SLW937 Name: School Orchestra Playmat Series: InstrumentsProduct Specifications: