Our easiest, most productive call just got better! The H2O Easy Yelper will operate under any hunting condition. Rainy, no problem – the H2O is waterproof. Windy, no problem – the H2O carries loud and clear.The highly waterproof coating allows the H20 to work in the heaviest rain storms. This is the truly all weather, all condition, easiest call to operate for today's turkey hunter. Requires no chalking.