Built specifically for Fourth Arrow’s Wyndscent Vapor Unit. Each bottle is filled with 7ML of Roger Raglin's Maniac 150, specially formulated to create a vapor with the Wyndscent Unit. It is enough to fill your Wyndscent tank 1.25 times, and one tank will last around 40 hours. The Maniac 150 vapor can travel up to 300 yds. Once the unit is active, you have the option for it to go off every 60 seconds, or you can override and used it when you want via remote control up to 40 yds.