The secret to a haunt quality scare is to startle your guests, and this industrial air cannon really delivers! An ear-piercing BOOM is followed by a blast of air.* Activated by an included motion sensor for maximum surprise effect. Reguires AC power and 100-125 psi air compressor. 16 inches x 24 inches. *Hearing and safety precautions should be taken. PLEASE NOTE: This item is a Special Order and may take 2 to 4 weeks for delivery. Call us for availability if you need this sooner.