TheBugWatch® anti mosquito repellent watch combines technology with nature’s most effective mosquito repellent Citriodiol® TheBugWatch® includes one anti mosquito BugBlock™ which is effective for up to 360 hours (15 days) after opening. Using time-release technology, once opened and exposed to air, the BugBlock™ activates, forming a 360° protective shield around the area of use, masking you from blood-sucking bugs!