Portable Roll-up Electronic Piano: The flexible roll-up piano features 49 keys, featuring real piano tone with sustain, echo and trill effect, portable handy piano keyboard for carrying. Easy Control Panel: 8 tones and 6 demos songs optional, record function and play, volume adjusting can be easily controlled with the side panel. Daily Waterproof Silicone Keys: Soft silicone material makes the white and black keys smooth touch feeling, comfortable to touch and play. Built-in Battery Powered: Powered with built-in 360mAh battery, it can be recharged with USB cable included. 3.5mm Audio Output: You can connect headphone or speaker to the electronic piano, for more fun with music.