A roll-up piano with 37 standard keys. Explore 8 tones and 6 demo songs, record your melodies with the Record & Play feature. Enjoy guided learning with the Tutorial function. The PN37 features smart sleep mode, knob volume/power control, and supports external devices. Powered by an included USB DC5V cable or 4 AAA batteries, it offers versatile and portable play. Certified with CE, RoHS, FCC, EN71-1-2-3, REACH, and ASTM, the PN37 ensures a secure and enjoyable musical experience for enthusiasts of all ages.