The rugged Yaesu MH-73A4B waterproof speaker microphone features a 680 ohm electret condenser mic element and an 4 ohm speaker. Rated output is 0.5 watts. It is rated submersible to the IPX7 Standard (1 meter for 30 minutes). There is a revolving belt clip on the back of the mic. The microphone is 2.4in x 3.3in x 1.5in at 5.3 ounces.
• Yaesu FT-270, VX-6R, VX-7R
• Standard Horizon HX370S, HX500SLI, HX471S, HX750S, HX760S, HX850S