Description: Name: electronic drum Material: silicone + plastic Power supply: 2 AA battery (not included) or USB cable (included) Item size: 40 x 25 x 1.5cm / 15.7 x 9.8 x 0.6in Item weight: 417g / 14.7oz Package size: 31.5 x 17.5 x 6.5cm / 12.4 x 6.9 x 2.6in Package weight: 840g / 1.9lb Features: 1. With 9 colored drum mats, including 3 x Tom drum, 1 x military drum, 1 x bass drum, 3 x cymbal and 1 x cymbal 2. Without speakers, you need to connect external speakers or headphones through the 3.5mm audio output interface to enjoy the drum sound; It also has a 3.5mm audio input for connecting MP3 / smartphone / tablet to play accompaniment music. 3. Built in 3 drum styles, 8 demonstration songs and 10 rhythms to make your learning and practice easier and more interesting;  4. Dual power option: 2 AA battery (not included) or powered by computer / Laptop / DC 5V power adapter through the attached USB cable. Packing list: 1 x electronic drum 2 x drum stick 1 x pedal set 1 x USB data cable 1 x user manual Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.  Manual measuring,please allow 1~3mm error,thank you.