Soft Roll Up Electronic Flexible Piano Keyboard 61 Keys?? Built-in Speaker?? Powered with 4x aaa Batteries?? Chargeable with A/C Adapter.</br>Compact and light-weight?? making it ultra-portable?? Fully-adjustable?? Offers great sound and quality</br>61 Standard Keys Full Size Keyboard (C2-C7) 5 Octaves + 1 Key?? 128 Tone Repertoire??100 Background Rhythms.</br>40 Demonstration Songs - for study and appreciation of classical music?? MIDI Out - 16 Output Channel Design - You can choose which channel (1 thru 16) that the roll-up piano keyboard can transmit on.</br>Keyboard Size (Open) : 35" 0.2" (88 x 17.5 x 0.5 cm)</br></br>Product Description</br></br><br>Product Description <br>Soft Roll Up Electronic Flexible Piano Keyboard 61 Keys?? Built-in Speaker?? Powered with 4x aaa Batteries?? Chargeable with A/C Adapter. <br>Compact and light-weight?? making it ultra-portable?? Fully-adjustable?? Offers great sound and quality. <br>61 Standard Keys Full Size Keyboard (C2-C7) 5 Octaves + 1 Key?? 128 Tone Repertoire??100 Background Rhythms. <br>40 Demonstration Songs - for study and appreciation of classical music?? MIDI Out - 16 Output Channel Design - You can choose which channel (1 thru 16) that the roll-up piano <br>keyboard can transmit on. <br>Keyboard Size (Open) : 35" 0.2" (88 x 17.5 x 0.5 cm) <br>Keyboard Size (Rolled) : 9.3" x 7" x 2.5" (23.5 x 17.8 x 6.4 cm) <br>Panel Size : 9" x 3.8" x 1.2" (22.8 x 9.5 x 3 cm) <br> <br>Feature: <br>Single and Fingered Chord. <br>Built-in Speaker. <br>New Digital Volume Control. <br>Power: 4 x AAAA Batteries (not icluded) and AC Power Adapter <br>Weight : 1.2kg. <br> <br>Package Content: <br>61 Keys Roll Up Piano MIDI Keyboard. <br>USB to MIDI Keyboard Interface Converter. <br>English user manual <br>AC Adapter <br>Microfiber Cleaning Cloth (as a gift)</br><br/>http://www.amazon.com/gp/product/B00YILGU7EEing set-up And be