Zon Gas Bird ScarerEffective gas operated bird scarer designed to protect crops and silage from bird damage. Produces loud bangs at intervals to deter birds. Volume adjustable by telescopic barrell Adjustable Interval, 30 Seconds to 30 Minutes Most user friendly cannon in the world Approximately 17,000 shots per 20lb propane tank Piezo electronic ignition Very easy to maintain, very few moving parts Compatinle with Zon Timer GT300