Roland BT-1 Bar Trigger PadCompact and reliable single trigger pad Curved shape for mounting on a V Pad or acoustic drum Quick and easy mounting through a drum tension rod; attachment parts for standard rod type mounts included Internal design eliminates false triggering while playing surrounding drums and or pads Use with a V Drums module or SPD series percussion pad to trigger sounds and control functions such as start stop of backing songs and phrase loops, effects on off,