The Hat is built for the Alesis Nitro family — Nitro Mesh, Nitro Max, and Nitro Pro. Plug it in, the module recognises it, and you get every articulation a hi-hat should give you.
For the Nitro Pro, Nitro Pro XL, and Nitro Pro Ultimate, you'll need a 3.5 mm to 6.25 mm jack adapter. You can add one to your order at checkout.