Feature: 1. 6 Tunes: This musical air horn can play 6 different tunes, satisfying all your expectation from a music air horn, and immediately attract people attention. 2. Complete Kit: The kit comes with 3 sturdy chrome plated metal horn, a 6‑key control button board and a connection cable, bring you more convenience. 3. Match to Use: The operation of the air horn requires an onboard air system, namely an air compressor (not included) and an air tank (not included) to work. 4. High Performance: The size is approximate 305/342/385x79mm, and adopt chrome plating process to make your vehicle more charming and distinctive. 5. Wide Applications: The high grade 3 air horn is widely used in trucks, club cars, yachts, mining carts, etc., to meet your needs with a louder sound. Specification: Item Type: 3 Air Horn Material: Aluminium Alloy Process: Chrome Plating Type: Air Horn Control Type: 6 Key Control Application: For trucks, club cars, yachts, mining carts Product Size: Approx. 305/342/385x79mm (12/13.5/15.2x3.1in) Current: 4.0A Sound Level: 145dB Operating Air Pressure: 0.5Mpa-0.8Mpa. Package List: 1 x Control Button Board1 x Connection Cable1 x 3 Air Horn Note: The product needs an external air source to work normally, and the original car cannot be used without an air source.