How many blast from one canister?

Maybe one -- this thing is worthless! did not work for me - a couple of blasts but inconsistent and then did not work at all. Do not buy

The horn is 120db and is very loud. Hope that helps and thank you so much for your interest in Better Boat.

What is the purpose of the screwable cap on the opposite side of the horn for?

This is used during production to assemble the portion that makes the noise within the horn. You don't need to open it or adjust anything with it. Hope that helps and thanks so much for your interest in our Air Horn. It means a lot to us here at Better Boat.

Is there an expiration date? How long does the air last before you have to buy another one?

Not a date on the container. This thing was basically worthless. Blasts intermittently, most of the time does not work. Save your money do not buy this thing. I give it a zero rating.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Air Horn 3.5 oz 120 dB, Loud Emergency Signal Horn for Boating Safety Walking Camping, Handheld Fog Horn Heard 1/2 Mile, Made in USA - Better Boat

Product ID: 133551748

Details

Brand
Better Boat
Color
3.5 oz With
Fit Type
Universal Fit
Style
3.5 oz With
Voltage
12 Volts

📢120 dB blast cuts through noise

🛥️USCG approved for boats ≤65 ft

🇺🇸Made in USA with cold-resistant propellant

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25863CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📣 Be the signal everyone trusts—loud, clear, and ready when it matters most!

UNMATCHED LOUDNESS - 120 decibels that pierce through engine noise and crowds—be heard from half a mile away.
COLD WEATHER RELIABILITY - HFC-152A propellant maintains pressure even in freezing conditions—no power loss when it counts.
COMPACT READY ANYWHERE - Pocket-sized and handheld for instant use on boats, trails, or urban adventures—carry safety with you.
COAST GUARD CERTIFIED SAFETY - Meets USCG requirements for vessels up to 65 feet, ensuring trusted emergency signaling.
TRUSTED AMERICAN CRAFTSMANSHIP - Proudly made in the USA by Better Boat, a family-owned brand with a 100% satisfaction guarantee.

The Better Boat 3.5 oz Air Horn delivers a powerful 120 dB emergency signal audible up to half a mile, meeting US Coast Guard standards for boats up to 65 feet. Made in the USA with a cold-resistant HFC-152A propellant, this compact, handheld horn requires no batteries and is designed for reliable use in boating, hiking, camping, and other outdoor activities.

Specifications

ASIN	B07MCVTRX8
Automotive Fit Type	Universal Fit
Best Sellers Rank	#2,554 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #3 in Boat Safety Horns
Brand Name	Better Boat
Color	3.5 oz With Horn
Compatible with Vehicle Type	Watercraft
Customer Reviews	4.4 4.4 out of 5 stars (11,394)
Fit Type	Universal Fit
Included Components	Air Horn
Item Type Name	Air Horn
Manufacturer	Better Boat
Manufacturer Part Number	853910007801
Manufacturer Warranty Description	Manufacturers 100% Satisfaction Guarantee
Model Number	BB-AIR-35OZ
Noise Level	115 Decibels
Style Name	3.5 oz With Horn
UPC	853910007801
Voltage	12 Volts

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Very impressed with the quality and fast delivery. Will shop here again.

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Good experience, but the tracking updates could be better.

2 months ago

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