Use the Scent Crusher Electronic Vapor Grenade Wind Detector to keep from blowing your cover. Utilizing state-of-the-art E-Vapor Technology, it checks the direction of the wind by emitting a scentless vapor for visual detection of even the slightest breeze. It fits comfortably in the palm of your hand and is always where you need it thanks to the included lanyard and clip. The vapor stick is easily replaceable and can last for a whole season with up to 300 optimally measured bursts. The Scent Crusher Electronic Vapor Grenade is the extra advantage you need to avoid detection.