AFI Phase II Drop-In Hidden Boat Horn w/ Black & White GrillsThe AFI Phase II Drop-In Hidden Boat Horn is a compact marine horn featuring an authentic marine sound. This Marine horn has a simple, drop-in installation and mounts from the outside. Comes with two screw-on grills - black and white. Grills have water resistant liners, which keep water out but allow sound through. Although compact, this horn has a new louder dB(A) rating of 111 at one meter. Installation: 2.75" diameter hole x 1" deep. Features: Authentic marine sound; Grills have water-resistant fabric liners; Mounts from the outside; Grill screws on for easy install; Easy retrofit; Specifications: Amps: 4 amps; 12V; dB(A) rating: 111 dB at one meter; Frequency: 370 A 20Hz; Click here to download AFI Phase II Drop In Hidden Boat Horn specifications