S61 High Quality Portable 61 Keys Flexible Piano USB MIDI Electronic Keyboard 129 tones,100 rhythms and 80 demos and the newest MIDI chips technology. you never knows it's a good start for you learning piano. Rich interface;SD card,USB,external speaker, headphone,external power source, sustain pedal.Not just hand roll piano, but also MP3 player, Repeator, story-telling machine to play for you and your kids. The thinnest white control panel,the thickened silicone keyboard, elegant body design,visual enjoyment and comfortable touch feelings and rechargeable Lithium Battery.no need dry batteries any more, more saving,more environmentally friendly. PROFESSIONAL DESIGN FOR CHILDREN AND BEGINNERS---Portable piano,the black key is 9MM higher than white key, as great as real piano.powerful and expressive, tones required by the most discriminating musician.Can be connected with MIDI software, conduct music creation.simple operation, high cost-effectiveness and easy portability. THE HIGHEST TECHNICAL QUALITY,UNLIKE THE CHEAP INFERIOR PRODUCT---The piano uses the newest 24 bit microprocessors, which endow it more powerful function and more mellow and standard tone in contrast with the traditional 8 bit microprocessors.This product has made the FCC product quality certification.and within three months, any quality problems can be free in exchange for new products.