Martinshorn, signal horn on an emergency vehicle, compressed air

Uses lung power to produce a signal Intended to assist in personal protection and safety on land and on water Does not use CO2, Freon, or batteries

Attwood 2460-7 Bellow Signal Horn, Lung-Powered, Meets USCG Rule 33 (Annex III) and EPA Regulations, 8 Inches H x 3 ½ Inches W

SoundAlert 100W Police Air Horn Amplifier Kit [120-130 dB Bullhorn Speaker] [Manual Control or Stock Horn Bybass] [10 A Fuse Protected] Electronic Air Horn for Emergency Vehicles Trucks Cars : Automotive

Air horn use hi-res stock photography and images - Alamy

Rescue horn hi-res stock photography and images - Alamy

Rescue horn hi-res stock photography and images - Alamy

Safety Technology 129 DB Air Horn : Sports & Outdoors

POWERFUL - Built entirely from rust-resistant components and pushing 120-130 dB of traffic power, our 100 W bullhorn speaker works flawlessly with the

SoundAlert 100W Police Air Horn Amplifier Kit [120-130 dB Bullhorn Speaker] [Manual Control or Stock Horn Bybass] [10 A Fuse Protected] Electronic Air

SoundAlert 100W Police Air Horn Amplifier Kit [120-130 dB Bullhorn Speaker] [Manual Control or Stock Horn Bybass] [10 A Fuse Protected] Electronic Air Horn for Emergency Vehicles Trucks Cars : Automotive

Horn and siren hi-res stock photography and images - Alamy

Emergency Survival Horn – Coghlan's

Emergency Air Horns ✔️ Air Horn Alarms