Description Function Introduction:LED digital display, automatic hibernation function, 128 timbres, 128 rhythms, 14 demonstration songs, timbre and rhythm mode selection keys, recording, programming and playback functions, demonstration song jukebox, teaching functions, start/stop, insertion functions, piano and keyboard drum functions, sustain and tremolo functions, master volume control, velocity control functions, MIDI OUT, USB 5V power supply Delay foot switch port, headphone/audio output port, power supply: 1. USB 5V external power supply; 2. built-in 1100mA lithium battery power supply88KEY PO-8815Features:88 keys portable roll up piano, convenient storage and easy carrying.Silicon keyboard with thickened design, more real and more comfortable feeling.Features 14 demo songs, 128 kinds of rhythms, 128 kinds of tones.Supports recording, programming, playback, tutorial, sustain and vibrato functions.Piano/ drum kit functions, master volume and tempo control keys.With LED display showing the relevant parameter information.With built-in speaker and headphone jack for connecting earphone or external speaker.With USB MIDI output and sustain pedal interfaces.Dual power supply: built-in 1100mA li-ion battery or USB 5V power adapter.Specifications:Color: Black + WhiteMaterial: Silicon + PlasticKeyboard: 88 keysTone: 128Rhythm: 128Demonstration songs: 14Power Supply: Built-in 1100mA Li-ion Battery or USB 5V Power AdapterPower Adapter: US PlugMain body size: 23 * 9.5 * 2.5cm / 9.1 * 3.7 * 1inKeyboard size: 125 * 16 * 1cm/ 49.2 * 6.3 * 0.4inProduct Weight: 1251g / 2.8lbPackage Size: 28.5 * 23 * 9.5cm / 11.2 * 9.1 * 3.7inPackage Weight: 1730g / 3.8lbPackage List:1 * Roll Up Piano1 * Pedal1 * USB Cable1 * Power Adapter (US)1 * User Manual(English)