STANDARD 9 PADS: 9pcs drum pad, 2pcs drum step, 12pcs demonstration song, 7pcs drum group, 9pcs accompany, standard design with pedal expansion interface. MELODY CREATION: Electronic Drum Set With audio input and output interfaces, the roll up drum pad has strong expansion ability and can freely choose music songs to create music. FREE CONNECTION: Electronic Drum Set Connect the stereo to make the sound more impressive. Can also use USB DC5V power supply or power bank for stable working. ELECTRONIC DRUM: Electronic Drum Set Simple and stylish appearance, lightweight and easy to carry. Built in multiple groups of drum sound sources, the most authentic and shocking drum beating. MUSIC RECORDING: Electronic Drum Set With recording function, it is convenient for you to record your music inspiration anytime and anywhere. Connect the earphone, and it will not disturb others when playing the drum.