Trump combines the power of a horn and the simplicity of a fog horn. More than 100 dB can be achieved without effort. Work by vibrating a thin plastic membrane that can be replaced with any thin plastic film. Indestructible, environmentally conscious, buoyant and affordable. Length: approx. 200 mm. Diameter: top approx. 70 mm. Diameter: bottom approx. 45mm Other boat accessories can be found in the shop of Daniboot.