iWord S3061 61 keys roll up piano keyboard * Made of harmless silicone, can be rolled up in a pouch, easy to carry and store * Simulate standard 61 keys roll up piano, enjoy music fun anytime and anywhere * Powered by built-in 2000mAh Li battery, support playing for over 24 hours * DC 5V USB charging * Built-in dual speakers, great sound like real piano, can connect to external speaker and headphone too * Keyboard thickness reach to 11mm, like play real piano * The first roll up piano with microphone connection, sing with the piano * 128 tones, 128 rhythms, 15 demo songs as option * Sustain, vibrato as sound effect * Record function with 60 recording notes * Transpose function * With pedal