The handheld WoodsCan Hornet rechargeable electric air horn uses a small electric compressor which pumps air through a mechanical trumpet to achieve in excess of 121 decibels of sound. This is the same sound at the same volume as disposable compressed gas air horns, but for a much longer duration (20 times longer) per battery charge than a single disposable gas air horn.
Disposable compressed gas air horns use a manmade, potent greenhouse gas as a propellent and will last approximately 90 seconds, less in cold weather. The metal cans that hold this gas are not reusable or recyclable.