Compact size and portable roll-up electronic d set, very convenient to carry and store. With 7 silicon d pads including Tom/Snare/Hi-Hat/Crash/Ride, making excellent sounds and simulating real beating effect. SNARE and HI-HAT positions can be exchanged by pressing SPECIAL button, according to the hahit of player. Built-in 5 d set tones, 8 demo songs and 3 types of rhythms for easier practice. Supports USB port or 2 * AAA batteries power supply.(batteries are not included) With 3.5mm headphone output jack for connecting external earphone or speaker. With MP3 input for connecting MP3/smartphone/ tablet to playing accompanying music. perfect for d set learning & practicing of kids or beginners, family entertainment and friends gathering. Specifications: D Set Tones: POP, Rock, Latin, Electro, Percussion Demo Songs: Heavy Rock, Funk, Latin, Samba, Cha-Cha, Swing Hi-Hat, Upbeat Rock Power Supply: USB Cable(included) or 2 * AAA Batteries(not included) Item Size: 43 x 28 x 2.7cm / 16.9 x 11 x 1.1in Item Weight: 455g / 16oz Power: DC 5V Input: 2.5W Output: 2W Colour:black Material:Silica gel Package Contents: 1 * Hand Roll D 2 * D Sticks 1 * English User Manual Only the above package content, other products are not included. Note: Light shooting 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.