Electronic Horn, Black from AQUA-SIGNAL
This under-deck hidden horn is designed for vessels under 12 meters, draws less than 1/2 amp and is easily installed in a standard 2 1/4" cutout. Each unit is completely sealed and comes with a waterproof gasket. All openings are sealed to let sound out but prevent water from coming in. Loudness dB: 106-108dB. Design Standards: USCG, CE. Dimensions: 4. 92"L x 3. 11"W x 3. 43"D. Draw: Less than 0. 5A at 12V.

Stainless-Steel Compact Electric Horn - Double from AFI
Mini Twin Electric Horn Excellent for use in the marine environment. totally seal sound units have type 304 stainless cover, diaphragm and mounting brackets. Material: 304 stainless cover & horn diaphragm. Loudness dB: 106 dB. Approvals: ABYC for boats up to 20 meters. Dimensions: 3"L x 8"W x 1 3/4"H. Power Requirements: 12V. Draw: 3A @ 12V (max. 6A). Fundamental frequency: 490±20/440±20.

Drop-In Hidden Horn from AFI
Designed for easy installation, this hidden horn mounts from the outside. Compact in size, but capable of 107db loudness. Comes with both black and white snap-on ASA plastic grilles. A weatherproof fabric liner lets sound through, but keeps water out. Prewired for 12V installation. Material: ABS plastic . Loudness dB: 107dB . Design Standards: Meets ABYC specs for boats up to 12 meters . Dimensions: 2"H x 3-3/8"W x 3-1/4"D . Power Requirements: 12 Volts .

Drop-In Hidden Horn Grill - White from MARINCO
Product Features: For use with Drop-In Hidden Horn - Marinco #11095 (and #11079).

12 Volt White Dual Trumpet Mini Air Horn from AFI
White epoxy powder-coated finish over solid brass. Noncorrosive Lexan® diaphragm. 12vDC. . Draws 20 amps max. Includes compressor, air tubing, fittings, and hardware. 5" W x 3-3/4"H x 9-1/2" L.

Compact Horn w/ Black Cover 10023 from AFI
Stainless steel diaphragm and mounting bracket . Black polypropylene cover . Dimensions: 4 inches L x 3-3/4 inches W x 2-3/4 inches H . Maximum amp draw: 4 Amps . dB(A) rating: 108 at one meter Fundamental frequency: 350±15 .