Features: Supports recording, programming, playback, tutorial, sustain and vibrato functions. 14 demo songs, 128 kinds of rhythms, 128 kinds of tones for easier practice. LED display shows the relevant parameter information clearly and intuitively. Built-in speaker and headphone jack for connecting earphone or external speaker. With USB MIDI output interfaces to support computer or tablet connecting. Specifications: Condition: 100% Brand New Color: Black + White Material: Silicon + Plastic Keyboard: 88 keys Tone: 128 Rhythm: 128 Demonstration songs: 14 Power Supply: USB 5V Power Adapter(Not included) Battery: Built-in 1100mA Li-ion Battery Main body size: 23 x 9.5 x 2.5cm / 9.1 x 3.7 x 1in Keyboard size: 125 x 16 x 1cm/ 49.2 x 6.3 x 0.4in Total Length: Approx. 133cm / 52.4in Weight: Approx. 1725g Packing List: 1 x Rolling Up Piano 1 x Pedal 1 x USB Cable 1 x DC Power Cable