Have you ever think of a keyboard with MP3 player function to play the music of your MP3? Would YOU want this kind of keyboard? Have our Joy 61-key standard piano keys keyboard set if you like! with the MP3 player function, you can freely play the music of your MP3 equipment through the disk jack, which means, you buy one and have two kinds of musical equipment. Besides, you can attach you other Equipment's to it through the microphone jack, audio input jack, phone, output jack. this 61-key standard keyboard is built with various function options: keyboard percussion, master volume/ accom volume/ tempo control, single finger/ fingered chord, sync/ fill-in, rhythm programming function, record & playback, sustain/ vibrato/one-key/ follow/ ensemble, which would meet your specific demands as well as offering you different playing experience. app function: This keyboard can be recognized by the keyboard training apps downloaded on phones or pads, thus realize the training functions in apps. applicable apps: 'simply piano','pianomaestro' Or any apps that can recognize the sound of keyboard. guaranteed sound and quality: each of our 61-key standard keyboards is professionally produced and carefully d to ensure great sound and quality for you; each piece in this pack is strictly produced to offer you excellent playing experience. just don’t hesitate to click on the “add to cart” button and have our high-quality 61-key standard piano keys keyboard pack! package Contents: 1 61-key standard piano keyboard1 music stand1 headphone1 keyboard stand1 music stool1 dc9v/AC adaptor1 owner’s manual.