Protect your investment from bird and wildlife infestation automatically! Scare-away LP gas cannons produce harmless 130 decibel thunderclap bangs to disperse birds and wildlife from crops, orchards, vineyards, campuses, golf courses, fish ponds, parks, airfields, and landfills just to mention a few applications. Scare-away cannons are powered by the same five gallon LP gas cylinders used for outdoor grills. The cost for this valuable protection - pennies a day. The Multi-bang produces six bangs within 90 seconds. Three bangs are fired in the first 30 seconds, and three addional bangs are fired at irregular intervals.