Roll Up Piano Keyboard, Roll Up Piano, Waterproof Family Friends for Kids Children (88 Keys English)

The charging function (external replaceable lithium battery) means you no longer have to worry about running out of electricity when you go out to play, let alone buying batteries and spending money. The thick design raises the black keys by 9mm [black keys are higher than white keys], making playing more comfortable. The waterproof design of the keys and anti-interference technology avoid the trouble of being easily disturbed by the outside world. Professional audio structure design, powerful dual magnetic speakers, more realistic, clear and crisp treble, heavy bass. The touch function control panel and electronic volume buttons are easy to use and durable.