{"product_id":"mh-45b4b-heavy-duty-noise-cancelling-speaker-mic","title":"MH-45B4B Heavy Duty Noise Cancelling Speaker Mic","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eMotorola MH-45B4B Heavy-Duty Noise-Cancelling Speaker Mic: rugged radio comms for high-impact crews\u003c\/h2\u003e\n\u003cp\u003eIntrinsically safe remote speaker microphone | noise-cancelling element | heavy-duty build | large glove-friendly PTT and volume | 3.5 mm earphone jack | Motorola 2-pin connector | one-year replacement warranty.\u003c\/p\u003e\n\u003cp\u003eThe MH-45B4B (Motorola part # A13960507) is a rugged, intrinsically safe speaker microphone designed for VE and VX\/EVX two-way radio series. Its noise-cancelling audio and durable construction deliver clear communications in extreme, high-impact environments. If you are unsure your exact radio is supported, contact us to confirm fit before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWho it's for\u003c\/h3\u003e\n\u003cp\u003eBuilt for firefighters, security teams, and industrial operators who need rugged dependability and clear, safety-rated communications in mission-critical environments, even with gloves on and engines running.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty construction:\u003c\/strong\u003e built to withstand drops and frequent use; ideal for high-impact settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise-cancelling microphone:\u003c\/strong\u003e filters background noise for crisp voice clarity in loud surroundings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge PTT and volume control:\u003c\/strong\u003e easy to use with gloves, with loudspeaker volume adjustability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5 mm earphone jack:\u003c\/strong\u003e supports an optional earpiece for private listening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntrinsically safe rated:\u003c\/strong\u003e certified for use with IS-rated radios like the ISVX-410\/421 and ISEVX-534\/539.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide compatibility:\u003c\/strong\u003e works with Motorola VX- and EVX-series and Vertex Standard models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMic impedance\u003c\/th\u003e\n\u003ctd\u003e2.2 kΩ @ 1 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeaker impedance\u003c\/th\u003e\n\u003ctd\u003e8 Ω, max 0.6 W input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e≈220 g (0.49 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnector\u003c\/th\u003e\n\u003ctd\u003eMotorola 2-pin + 3.5 mm earjack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertifications\u003c\/th\u003e\n\u003ctd\u003eIntrinsically safe (FM\/ATEX) with IS radios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003eOne-year replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMH-45B4B speaker microphone\u003c\/li\u003e\n\u003cli\u003eCoiled cord with quick-disconnect\u003c\/li\u003e\n\u003cli\u003eSwivel clothing clip and belt clip\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat radios is the MH-45B4B speaker mic compatible with?\u003c\/h3\u003e\n\u003cp\u003eIt works with Motorola VX-\/EVX-series and Vertex Standard radios, and is certified for intrinsically safe models such as the ISVX-410\/421 and ISEVX-534\/539. Contact us to confirm your exact model before ordering.\u003c\/p\u003e\n\u003ch3\u003eIs the MH-45B4B intrinsically safe?\u003c\/h3\u003e\n\u003cp\u003eYes. It is rated intrinsically safe (FM\/ATEX) when used with IS-rated radios, making it suitable for hazardous-environment crews.\u003c\/p\u003e\n\u003ch3\u003eDoes it work with gloves on?\u003c\/h3\u003e\n\u003cp\u003eYes. The large push-to-talk button and volume control are designed for glove-friendly operation in the field.\u003c\/p\u003e\n\u003ch3\u003eCan I use an earpiece with it?\u003c\/h3\u003e\n\u003cp\u003eYes. A 3.5 mm earphone jack supports an optional earpiece for private listening in noisy or discreet settings.\u003c\/p\u003e\n\u003ch3\u003eWhat comes in the box?\u003c\/h3\u003e\n\u003cp\u003eThe MH-45B4B speaker microphone, a coiled cord with quick-disconnect, and a swivel clothing clip plus belt clip.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What radios is the MH-45B4B speaker mic compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It works with Motorola VX-\/EVX-series and Vertex Standard radios, and is certified for intrinsically safe models such as the ISVX-410\/421 and ISEVX-534\/539. Contact us to confirm your exact model before ordering.\"}}, {\"@type\": \"Question\", \"name\": \"Is the MH-45B4B intrinsically safe?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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