We have taken our original Big Mamma duck call and customized it to sound more like a live mallard! This duck call changes the game just as our Mr. Big II goose call did when we released it in 2012. The tone board has a special air channel groove in the tone board to help release reeds when moisture is prevalent. The groove creates an air bubble to put extra pressure on the bottom of the reeds when blown. We arent saying the call will never stick, but if it does start to stick, the air bubble will bust the reeds loose and clear out after one note. We have also drilled a hole in the insert of the call and created a "variable tone hole". This gives the call a lot more range and can sound like up to 3 hen mallards by moving your fingers around like a musical instrument. The third modification is on top of the mouth piece. We have taken a heavy duty latex and placed it over 70% at the opening of mouth piece. This makes the air more pressurized when presented into the call. More pressure in the mouth piece makes the reeds break over easier with the same amount of air normally blown into the call. The constricted opening also helps keep the air hitting the reeds in a direct line, making it easier to operate. The Big Mamma II is different than any other duck call on the market. This call has be created for the open minded duck hunter looking to add a unique, life like sound to his lanyard. Each call is customized by hand from Big Sean himself. Each call is also tested with heavy moisture on the tone board to ensure a "non stick" performance before its shipped. Big Mamma II comes in Double reed only. Made in the USA and satisfaction guaranteed. Call may take up to 3 to 4 weeks to ship. Each call is custom made per order. Ships within 1 week regularly.