Roland TD-15 Drum Sound Module with 1 Year Free Extended Warranty New sensing technology with Behavior Modeling provides a complete and natural drumming experience COACH and QUICK REC functions help build skills effectively at home, school, or any place of practice Large-sized LCD and simple user interface provides easy operation USB-MIDI/AUDIO can conveniently connect to computer applications QUICK EDIT buttons provide instant editing control over tuning, muffling, and strainer