Elecsmart Portable Electronic Roll up Drum Pad Kit Silicon Foldable with Stick Professional demo inside, convenient to shtudy. Accompaniment inside, temp adjustable (40-208), gives you the best way to study and practice. Note: when you use it, you need to connect your own headphones or audio equipment. Standard drum setting and expansive pedal make you feel absolutely the same as real drum. Portable and professional drum. High quality drum sound inside, brings you nature and powerful sound effect Audio input and output, excellent expandability for other devices. Powered by 2 * AAA batteries or DC 5V port. ith record function, you can record your inspiration anywhere anytime.