For reliability with the signature Scare-Away thunderclap bang, the M4 is the best value available.
The M4 Single-Bang cannon is capable of producing a thunderclap bang, and can be adjusted to fire every 30 seconds to every 15 minutes. Its piezo ignition system which requires no batteries can generate as many as 200,000 ignitions in its lifetime.
The use of ear protection is recommended when operating the M4. It is designed to be fired in an open field and placed on a flat ground. For best safety practices, do not use the M4 near dry vegetation or material. For best results, change locations and vary the rate of fire often.