1This 88 key roll up piano has built-in stereo loudspeaker, 140 tones, 128 rhythms and 30 demo songs. 2The piano keyboard is made of environmental silicone material, which is soft and comfortable and will not easily break. Fully closure design for resist to water, dust and oil, also easy to clean with wet towel. 3Built-in 1000mAh large capacity lithium battery supports charging by power bank. 4Portable roll up design allows you to practice piano anytime anywhere. 5Easily record, edit, play, sustain, tremolo, teach, chord function. 6The timbres are very crisp just like a real piano, ideal for making tunes, beginners, professionals, kids and adults. Item Type: Roll Up Piano Number of Keys: 88 Key Plug Type: US plug 100-240V border: 1px solid000important;}1 x Roll Up Piano1 x Pedal1 x USB Cable1 x Battery1 x US Plug1 x User ManualHow to exclude legato gestures:1. Single& 8209;key legato: Reason: When the finger is playing, the force is not enough, the force is uneven, and jitter is generated; How to avoid legato: When playing, the strength should be sufficient, and the pressing force should be uniform to avoid jitter.2. Adjacent key legato: Reason: The finger touches the adjacent key when playing, resulting in mis& 8209;touching the adjacent key and pronunciation; How to avoid legato: When playing, press the finger in the center of the key, avoid pressing the edge of the key.3. Legato: Reason: When playing, the non& 8209;playing finger is not lifted, and it touches the key and mispronounces it; How to avoid legato: When playing, the non& 8209;playing finger should be lifted to avoid pressing piano keys.