Power supply: USB 5V/1A or 2*AA battery(Not included) Audio jack: 3.5mm Item Size: 40 x 28 x 2.5cm / 15.74 x 11.02 x 0.98inch Item Weight: 700g / 24.69oz color:Black Material:Silica gel Package Contents: 1 x Electronic 2 x Drum Sticks 2 x Foot Pedals 1 x English Manual 1 x USB Cable Only the above package content, other products are not included. Note: Light 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. Mainly made of silicone, and flexible to use, providing great portability of playing when and where you want. It's easy to use, can be powered by USB power supply or battery, just plug in the foot pedal connection, turn it on, then enjoy playing the drum. Including 9 drum pads: two cymbals, open/closed Hi-hat, High , Snare Drum, Base drum, Ride Cymbal, Low , Floor . Can be connected to external amplifier to give you an immersive experience or your headphones for quiet practice. Great drum sets for beginners and also a great both and kids that would like to practice and record playing drums. Offers several demo , drum styles, rhythms, bringing lots of fun of playing, with volume and speed control function and even record and playback function, great for practice.