[122dB LOUD BLAST WITH ADVANCED HFO-1234ze GAS] Powered by advanced HFO-1234ze propellant, this air horn uses a non-flammable clean-formula designed for lower environmental impact while delivering a powerful 122dB blast for reliable signaling in emergencies, outdoor safety, and more. It replaces traditional HFC-134a and HFC-152a for improved climate performance

[3.5OZ HIGH-CAPACITY FOR LONGER-LASTING USE] The 3.5oz canister holds approximately 2.5X the gas of standard 1.4oz air horns, providing more blasts per can for extended boating trips, commercial vessels, camping, hiking, roadside emergencies, and emergency preparedness

[PRACTICAL MARINE EMERGENCY SIGNALING FOR BOATS] This portable loud air horn works great as a handy onboard audible signal accessory for vessels. The powerful 122dB loud blast fits perfectly for emergency distress alerts, nearby collision reminders, docking prompts, and audible notifications during foggy days or low visibility conditions on the water

[ONE-BUTTON OPERATION – NO BATTERIES, NO CHARGING] This boat air horn activates instantly with a simple press of the button. No complicated setup or electronics required — just reliable performance when you need it most. Factory-sealed for a long shelf life

[EASY TO GRIP & HANDHELD DESIGN] Ergonomic handheld design provides a secure and comfortable grip. Larger than mini air horns but still compact enough to fit in your bag, glove box, or emergency kit. The bright red or blue color makes it easy to locate quickly when needed

CAUTION: Do not use upside down. Avoid sounding near ears, as this product produces an extremely loud blast. Do not use in temperatures above 50°C (122°F). Do not hold the button down. Only spray 2–3 seconds at a time