Falcon Sonic Blast 1oz Refill Pack Of 2. When you need to get a loud blast across an enclosed area without a window this Refill by Falcon provides a piercing 112dB blast at 10 feet which meets US Coast Guard requirements for boats up to 39' (12 meters). The Falcon 1oz Sonic Blast Refill meets the US Coast Guard requirements for boats up to 39' (12 meters) so you can be safe while you sound your horn. Each canister provides up to 12 blasts per can which means you can reuse this item multiple times. This canister is only the size of an egg yolker so you cannot use the refill on an uncovered area. For best results put the refill canister into a horn that has a narrow focus. Since the focus of the refill canister is so close to the horn the canister will automatically spray the noise at a high volume. The Sonic Blast Horn meets US Coast Guard requirements for boats up to 39' (12 meters) so you are sure to get the attention needed to sound your horn. Make your boat safer and more aware by keeping the Falcon Sonic Blast Horn Refill in your safe have storage. Features of Falcon Sonic Blast 1oz Refill Provides a piercing 112dB blast at 10 feet Up to 12 blasts per can Meets US Coast Guard requirements for boats up to 39' (12 meters) Canister only refills do not include horn Package Contents: Falcon Sonic Blast 1oz Refill Falcon FSBIR2: Sonic Blast 1oz Refill Pack Of