I have it on a copper john pro111 sight and i luv it. i used to have the pse sight light and it works better than that one and it good on batteries. it doesnt use a lot of juice like it did. its well worth the money. i also recommend going ahead and getting the sight cups if u havent already. it kept my pins from getting broke off many times. youd be surprised if u walk through thick brush how much vines and briars and crap can get wrapped around ur bow. just my two cents