The following are compatible hihat controllers that can be use to trigger the hihat sounds in the SPD-30:
Roland FD-8
https://www.roland.com/global/products/fd-8/
Roland VH-11
https://www.roland.com/global/products/vh-11/
The following are compatible hihat controllers that can be use to trigger the hihat sounds in the SPD-30:
Roland FD-8
https://www.roland.com/global/products/fd-8/
Roland VH-11
https://www.roland.com/global/products/vh-11/