The Adrenaline is a high performance goose call that was designed to execute advanced note combinations. It is deep on the low end with a very sharp “crack” on the top end. Perfect for contest callers and guys that need volume and appreciate great realism. All Adrenaline Goose Calls come with the Field Proven “Mark 2 Semi Worn Gut” system. The Mark 2 guts have a slight, semi wear line in the tone channel that increases the tonal qualities to a rich, full sound. The semi wear line is a jump start to wearing the guts in properly but still allows the caller to wear in their own set of guts for long term use. Includes a DVD with over an hour of instruction to enhance your goose calling skills. Standard Gut System: FP Mark 2 “Semi Worn Guts” Optimum performance conditions for Adrenaline use: Contest calling, high wind days, hunting migrators, on water, no wind days, heavily hunted geese “call shy geese”, hunting large and medium size subspecies of Canada Geese, running traffic.