PORTABLE AND PROFESSIONAL DRUM: 7 pads and two drum pedals make professional variety sounds including Tom, Snare, Hi-Hat, Crash, Ride, Hi-Hat. Professional demo inside, convenient to study. BUILT-IN LI-BATTERY: This drum is powered by a 2000mAh rechargeable battery Built-in, up to 10 hours playtime per charge, You will be able to take it with you anytime anywhere even play outside Built in Speaker bring super bass effect, without connecting with other device! With USB MIDI Jack and 3.5mm audio