SeaChoice Products Pump Blast Air Horn - Use this Pump Blast Air horn at sporting events or keep it in your vehicle or boat as you need to use it to notify anyone of your location effectively. This Pump Blast Air Horn uses a small plastic plunger to pump up the air and allow you to use it. It does not use cans or chemicals that needs to be replaced every so often. Eco-Friendly No replacements can or chemicals Easy to use Plastic plunger Rating: 100 decibels