Check the listing for details. Kleinn Air Horn Model 99 Compact Dual Car Horn with Chrome Plated Trumpets. Condition: New. Listed at 46.95 USD. Need a loud air horn on your vehicle but you're working with a tight space?. Don't let the size of this air horn fool you, the Kleinn 99 produces a loud air horn blast that makes you ears ring. We are an Authorized Dealer of Kleinn Air Horns and carry the full line of products.