MB-21 8 Watt VHF Extension Speaker - Black This compact marine communications speaker includes a stainless steel mounting bracket and stainless steel grill.  These waterproof communication speakers can be mounted where you can hear your VHF radio. Features: * Completely waterproof and corrosion-proof * Features stainless steel grills, sturdy plastic frames, polypropylene speaker cones and Teflon-coated wires * 10' Lead wire w/mini-plug and RCA adapter  Specifications: * Peak Power Handling - 8 watts * Continuous Power - 4 watts * Speaker Impedance - 4 ohm * Weight - 0.35 lbs per speaker * Overall Dimensions - 2-15/16' x 2-3/4' x 1-5/16' (74mm x 69mm x 33mm) *Sold as a Single