High quality silicon product;Simulated interface and sound effects of electronic piano</br>Various sound style and processional demo included</br>Supports MIDI out??loud speaker?? headphone etc</br>Not only educational product?? suitable for children to develop an interest in music and professional players for practicing and composition</br>Material: Silicon</br></br>Product Description</br></br>Pad Number: 61 (standard Piano Key 5 Octave + 1 Key) Tone:128 Rhythm:100 Demonstration Songs:40 Power source:4x 1.5V AAA / DC 5V Size: Main Body:9cm x 23.5cm x 2.7cm; Keyboard: 89cm x 18cm x 0.4cm System Requirements: PC Operating System: Windows XP/Vista/7/8 MAC Operating System: MacOS 8.5?? 8.6?? 9.x?? OS X Package Contents: 1x 61Keys Roll-up Piano 1x USB power cable</br><br/>http://www.amazon.com/gp/product/B00EX4MP7U