The Zink Calls Power Maximus PM-1 goose call is a high performance call designed for guides, outfitters, contest callers and hard core hunters. This goose call has maximum volume with sharp hollow tones. There you have it... the secret is out. Zink has been designing and perfecting this Canada goose call for three years. After heavy testing in the field and on the contest stage, we have to say we are very impressed.