1Rechargeable function (external replaceable lithium battery), no longer have to worry about running out of electricity when going out to play, let alone buy a battery and spend money. 2Thick design, black keys raised by 9mm [black keys are higher than white keys], making playing more comfortable. 3Waterproof design of keys and antiinterference technology avoid trouble of being easily disturbed by outside world. 4Professional audio structure design, strong dual magnetic speakers, more lifelike, clear and crisp treble, deep bass. 5Touch function control panel and electronic volume buttons are easy to use and durable. Condition: 100% Brand New Item Type: Roll-up Piano Model: PA88 Tone 88 Keys (A1-C9) Standard Piano 128 Tones, 128 Rhythms, 30 Demo Songs Digital Display Master volume control key Speed Control Key Mode Selection Keys (tone and rhythm) Recording, OOP, Playback functions Single finger chord and multi finger chord Start/stop, synchronous incest function keys Demo song Drum kit Keep Pedal Function Power Supply: Built-In 1000 mAh Lithium Battery, USB DC 5V Power Supply 1 xRoll-up Piano 1 x Foot Pedal 1 x 3.7V Lithium Battery 1 x Power Cord 1 x Manual Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.