*Drum set: 15 sets. Songs: 30 pieces ? Supports sensitivity parameter adjustment for each drum pad ? Three-digit LED display ? Speed control: 30-250 beats/minute ? Metronome: 1-4 types ? Other functions: real-time recording, parameter storage, reset ? Ports: USB MIDI, headphones, audio input, audio output NO-Drum Key Included Tom drum: 8-inch mesh, Hi-hat: 10-inch, Crash cymbal: 10-inch, Bass drum: 8-inch independent mechanical bass drum, Hi-hat pedal: independent hi-hat pedal