VHF Extension Speakers Surface Mount. Part Number: MB-41W . A stand-alone 4" VHF extension speaker thats completely waterproof, with stainless steel grill and mounting bracket, ABS housing and polypropylene cone. 10W Maximum Power Handling. Comes equipped with a 10 lead wire and mini-plug. Features: 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. Available in black or white color speaker. Specifications: Peak Power Handling: 20W/pair. Speaker Impedance: 4 ohm. Frequency Range: 1K to 10K Hz. Weight: 1.05 lbs per Speaker. SPL: 83 dB+/-3 dB. Overall Dimensions: 2-15/16" x 2-0.75" x 1-5/16" (74mm x 69mm x 33mm).