Power Calls Wavelength Acrylic Canada Goose Call. This short reed Canada Goose call is designed to be an all-around workhorse. It will hit loud hails and aggressive fast sequences, yet still hit the lowest finishing work imaginable. The engine of this call, Power Calls worn-in Lightning tone board is based off the set of guts World Champion and Champion of Champions Goose Caller Kelley Powers used for years on stage and in the field. They provide a realistic deep tone from top to bottom as well as a proven winning tradition on stage. Structure: Machined CNC Acrylic Body Coloration: Stealth Black Core Guts: Polystyrene Worn-In Toneboard Reed: Mylar PreciseFit Reed Packaging: Hard Protective Case