An extremely startling effect. Produces a tremendous boom followed by a blast of air. Safety and hearing precautions must be taken. Optional motion sensor available. Requires AC power and a 100-125 psi air compressor (not included)**Please note: Due to the size and/or weight of this item, additional shipping charges may apply. A customer service representative will contact you after checkout to quote additional charges and make shipping arrangements. Please contact usif you would like a quote prior to checkout.