{"product_id":"mh-37a4b-1-single-wire-surveillance-kit-w-inline-ptt","title":"MH-37A4B-1 Single Wire Surveillance Kit w\/ inline PTT","description":"\u003ch2\u003eMH-37A4B-1 Single-Wire Surveillance Kit: discreet listening with inline PTT for Vertex radios\u003c\/h2\u003e\n\u003cp\u003eSingle-pin connector · Comfort loop-style earpiece · Inline PTT microphone · Fits right or left ear · Single-wire design · Accessory\u003c\/p\u003e\n\u003cp\u003eThe MH-37A4B-1 is a single-wire surveillance kit that pairs a comfort loop-style earpiece with an inline push-to-talk (PTT) microphone, built for two-way radios that use a single-pin connector. The loop earpiece fits either ear for discreet, all-shift listening, while the inline PTT keeps transmit control on the mic for one-handed operation.\u003c\/p\u003e\n\u003ch3\u003eWho it's for\u003c\/h3\u003e\n\u003cp\u003eBuilt for security, retail, hospitality and event teams that need low-profile audio on single-pin Vertex radios. If your model is not on the compatibility list, contact us to confirm the connector before ordering.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfort loop-style earpiece:\u003c\/strong\u003e fits the right or left ear for any user and all-shift comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInline PTT microphone:\u003c\/strong\u003e key up transmit directly from the mic for one-handed operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-wire design:\u003c\/strong\u003e simple, low-profile build for discreet communication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-pin connector:\u003c\/strong\u003e matches single-pin Vertex two-way radios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Vertex compatibility:\u003c\/strong\u003e listed for a wide range of VX and EVX models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eMH-37A4B-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStyle\u003c\/td\u003e\n\u003ctd\u003eComfort loop-style surveillance earpiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicrophone\u003c\/td\u003e\n\u003ctd\u003eInline PTT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eSingle-pin (single-wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEar fit\u003c\/td\u003e\n\u003ctd\u003eRight or left ear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eAccessory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed compatibility\u003c\/td\u003e\n\u003ctd\u003eVX-210A, VX-160, VX-180, VX-230, VX-260 Series, VX-350, VX-410, VX-420, VX-450 Series, EVX-261, EVX-534\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat radios does the MH-37A4B-1 work with?\u003c\/h3\u003e\n\u003cp\u003eIt is listed to work with single-pin Vertex models, including the VX-210A, VX-160, VX-180, VX-230, VX-260 Series, VX-350, VX-410, VX-420 and VX-450 Series, plus the EVX-261 and EVX-534. If your model is not listed, contact us to confirm the connector first.\u003c\/p\u003e\n\u003ch3\u003eDoes the MH-37A4B-1 have a push-to-talk button?\u003c\/h3\u003e\n\u003cp\u003eYes. The kit includes a microphone with an inline PTT, so you can key up transmit directly from the mic without reaching for the radio.\u003c\/p\u003e\n\u003ch3\u003eDoes the earpiece fit the right or left ear?\u003c\/h3\u003e\n\u003cp\u003eEither. The comfort loop-style earpiece is designed to fit the right or left ear, so it works for any user and either side.\u003c\/p\u003e\n\u003ch3\u003eWhat kind of connector does the MH-37A4B-1 use?\u003c\/h3\u003e\n\u003cp\u003eIt is a single-wire kit with a single-pin connector. If you are unsure whether your radio uses a single-pin jack, contact us and we will confirm before you order.\u003c\/p\u003e\n\u003ch3\u003eWhat is the MH-37A4B-1 used for?\u003c\/h3\u003e\n\u003cp\u003eIt is a surveillance-style earpiece kit for discreet two-way radio communication, commonly used in security, retail, hospitality and event settings where the audio needs to stay low-profile.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What radios does the MH-37A4B-1 work with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is listed to work with single-pin Vertex models, including the VX-210A, VX-160, VX-180, VX-230, VX-260 Series, VX-350, VX-410, VX-420 and VX-450 Series, plus the EVX-261 and EVX-534. 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