Designed according to real piano 1:1,it's an Perfect gift and adult for budding pianist. The music keyboard has built-in speaker and multi-function interface,microphone,audio input function,supports MIDI line and computer connection, and also supports MP3 player,Bluetooth function,which can meet your more needs. The roll-up piano is made of high-quality material,its lightweight and rollable design makes it easy to carry and enjoy playing anytime and anywhere. Built-in drum simulation function,using super-real analog sound technology,switch drum status can achieve the function of analog drum,so you just pay one piano and get two musical instruments. Colour:multicolor Material:Silicone+Plastic Size:about 806 x 160 x 20mm Package Contents: 1 x Roll Up Piano Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.