MH-66F4B Intrinsically Safe Submersible Speaker Mic
IP57 Rated • Intrinsically Safe • Submersible • Remote Speaker Mic • EVX-S24 Compatible
The MH-66F4B Intrinsically Safe Submersible Speaker Mic is an IP57-rated waterproof remote speaker microphone built for your Vertex Standard portable two-way radio, letting crews talk and listen hands-free without unclipping the radio. Designed for wet, dusty, and hazardous-area work, the MH-66F4B keeps audio clear when conditions get tough — a rugged business two-way radio accessory for demanding job sites.
Who It's For
Built for teams running the Vertex Standard EVX-S24 who need intrinsically safe, submersible audio in wet or hazardous environments. Not sure if the MH-66F4B fits your radio? Call 1-800-984-1534 or contact our Canadian radio experts for a quick compatibility check.
Key Features
IP57 Submersible
Sealed to an IP57 rating, the MH-66F4B is a submersible speaker mic that keeps working through rain, splash, and wet-weather use.
Intrinsically Safe
An intrinsically safe design makes the MH-66F4B suited to hazardous and demanding work environments where standard accessories fall short.
Hands-Free Operation
Clip the remote speaker mic to your lapel or shoulder and key up without pulling the radio — talk and listen while keeping both hands on the job.
Vertex Standard Ready
Purpose-built for the Vertex Standard EVX-S24 portable two-way radio for a clean fit and reliable audio out of the box.
Compatible Radios
The MH-66F4B Intrinsically Safe Submersible Speaker Mic is compatible with the Vertex Standard EVX-S24 portable two-way radio. If you run a different model or are outfitting a mixed fleet, browse our full range of commercial two-way radios and accessories, or confirm fit before you order.
Not sure the MH-66F4B is right for your radio? Our Canadian team can confirm compatibility and recommend the correct intrinsically safe audio accessory — call 1-800-984-1534 or get in touch with us.
Check Compatibility & Get a Quote →
Frequently Asked Questions About the MH-66F4B Speaker Mic
• What radio is the MH-66F4B compatible with?
The MH-66F4B Intrinsically Safe Submersible Speaker Mic is compatible with the Vertex Standard EVX-S24 portable two-way radio. If you run a different model, contact our team at 1-800-984-1534 to confirm the correct accessory before ordering.
• Is the MH-66F4B waterproof?
Yes. The MH-66F4B carries an IP57 rating and is a submersible speaker microphone, designed to keep working through rain, splash, and wet-weather use where a standard speaker mic would fail.
• What does intrinsically safe mean for the MH-66F4B?
An intrinsically safe rating means the MH-66F4B is engineered for use in hazardous and demanding environments. It pairs that safety design with IP57 submersible protection for tough, wet job sites.
• Why use a remote speaker mic instead of the radio itself?
A remote speaker microphone clips to your lapel or shoulder so you can talk and listen without unclipping your radio. The MH-66F4B keeps your hands free for the task while keeping clear communication within reach.
