Poly-Planar Waterproof Marine VHF Radio Extension Speaker Completely waterproof and corrosion-proof Features stainless steel grills, sturdy plastic frames, polypropylene speaker cones and teflon-coated wires Ideal for use as a VHF remote Peak Power Handling: 20 watts/pair Speaker Impedance: 4 ohm , Frequency Range: 1K to 10K Hz and SPL: 83 dB+/-3 dB