Welcome to our store! 1. Rechargeable function (externally replaceable lithium battery), no longer need to worry about running out of power when going out and playing, let alone buying a battery and spending money. 2. Thickened design, black keys raised by 9mm [black keys are higher than white keys], making playing more comfortable. 3. Waterproof key design and anti-interference technology avoid problems with being easily disturbed by the outside world. 4. Professional sound structure design, strong dual magnetic speakers, more lifelike, clear and crisp treble, deep bass. 5. Touch function control panel and electronic volume buttons are easy to use and durable. Send: 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 Layer selection keys (tone and rhythm) Recording, OOP, playback functions Single finger chords and multi finger chords Start/stop, synchronous incest function keys Demo song Drum set Keep Pedal Function Power supply: Built-in 1000 mAh lithium battery, USB DC 5V power supply 1 x Roll-up Piano 1 x foot pedal 1 x 3.7V lithium battery 1 x power cord 1 x manual Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.