Roland TM-2 Trigger Module Features at a Glance: Over 100 ready-to-rock professional sounds Includes sounds designed for layering with acoustic drums Suitable for all genres, from rock and metal to electronic SDHC card slot lets you trigger your own WAV sounds stored on SDHC media Two trigger inputs support both single- and dual-trigger pads Simple, intuitive user interface Onboard effects include reverb, flanger, delay, and more MIDI I/O for triggering external sound modules and capturing MIDI data in your music software You can also play the TM-2 from other devices via MIDI Works with Roland RT-series acoustic drum triggers and Roland percussion pads Compatible with BT-1 Bar Trigger Pad, KT-10 Kick Trigger Pedal, V-Pads, and V-Cymbals Powered by batteries or included AC adapter