{"product_id":"motorola-pmdn4101ar","title":"Motorola PMDN4101AR Channel Selector Knob for CP185 Radios","description":"\u003ch2\u003eChannel Selector Knob\u003c\/h2\u003e\n\u003ch3\u003eOEM replacement channel selector knob for commercial portable radios.\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e (also designated as PMDN4101) is a genuine OEM replacement channel selector knob designed for Motorola commercial portable two-way radios. Engineered to fit onto the top rotary channel switch shaft, the \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e restores firm, tactile channel switching and clear detent feedback when navigating talkgroups.\u003c\/p\u003e\n\u003cp\u003eFrequent channel changes, industrial wear, and accidental drops can strip or loosen control knobs over time. Replacing worn hardware with a genuine \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e channel knob ensures positive engagement at each channel position, preventing accidental frequency drift during critical field operations.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDirect OEM Factory Replacement\u003c\/b\u003e: Exact fitment and color match for original Motorola radio housing specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMotorola PMDN4101AR Tactile Grip\u003c\/b\u003e: Textured ridged exterior provides secure rotational grip in wet or gloved conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePositive Detent Alignment\u003c\/b\u003e: Precision internal socket engages firmly with the channel shaft to deliver crisp tactile clicks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-Impact Polymer Construction\u003c\/b\u003e: Built from durable industrial-grade plastic to withstand daily torque and UV exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhite Position Indicator\u003c\/b\u003e: Molded white line mark allows fast visual confirmation of the active channel selection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMotorola Solutions\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\/SKU\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePMDN4101AR (PMDN4101)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eChannel Selector Knob\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMaterial\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-Impact Molded Polymer\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eColor\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBlack with White Indicator Mark\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMount Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePush-On Rotary Switch Shaft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCP110\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCP185\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEP350\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eMatching Control Knobs\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/products\/motorola-pmdn4102ar\"\u003eMotorola PMDN4102AR Volume Knob\u003c\/a\u003e\u003c\/b\u003e – Companion volume and power control knob for CP185 and CP110 series radios.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eActive Portable Radios\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/products\/motorola-cp200d-digital-analog-portable-two-way-radio\"\u003eMotorola CP200d DMR Two-Way Radio\u003c\/a\u003e\u003c\/b\u003e – Commercial digital portable radio for enterprise communication fleets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/products\/motorola-r2-digital-analog-portable-two-way-radio\"\u003eMotorola MOTOTRBO R2 Portable Two-Way Radio\u003c\/a\u003e\u003c\/b\u003e – High-durability digital portable radio built for demanding environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eBatteries \u0026amp; Audio Accessories\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/products\/motorola-nntn4497dr-battery-cp200d\"\u003eMotorola NNTN4497DR Li-Ion Battery\u003c\/a\u003e\u003c\/b\u003e – Genuine high-capacity replacement battery pack for commercial series radios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/products\/motorola-pmmn4013a-remote-speaker-microphone\"\u003eMotorola PMMN4013A Remote Speaker Microphone\u003c\/a\u003e\u003c\/b\u003e – Heavy-duty Windporting remote speaker mic with audio jack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMore Resources\u003cb\u003e\u003c\/b\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/blogs\/hytera-2-way-radios\/15-myth-busting-facts-about-two-way-radio\"\u003e15 Myth-Busting Facts About Two-Way Radio Range\u003c\/a\u003e\u003c\/b\u003e – Clear analysis dispelling common misconceptions regarding radio output power and coverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is the primary function of the Motorola PMDN4101AR knob?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e is a replacement knob that attaches to the top channel switch shaft to allow users to switch operating frequencies and talkgroups.\u003c\/p\u003e\n\u003ch4\u003eWhich Motorola radio models are compatible with the Motorola PMDN4101AR?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e is compatible with Motorola CP110, CP185, and EP350 portable two-way radios.\u003c\/p\u003e\n\u003ch4\u003eAre tools required to install the Motorola PMDN4101AR channel knob?\u003c\/h4\u003e\n\u003cp\u003eNo tools are required. The \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e features a push-on design that slides directly onto the radio channel switch shaft.\u003c\/p\u003e\n\u003ch4\u003eIs this the volume knob or the channel knob?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e is the channel selector knob. The companion volume\/power control knob is part number \u003ca href=\"\/products\/motorola-pmdn4102ar\"\u003ePMDN4102AR\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch4\u003eIs the Motorola PMDN4101AR a genuine Motorola OEM part?\u003c\/h4\u003e\n\u003cp\u003eYes, the \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e is an original equipment manufacturer replacement component manufactured directly by Motorola Solutions.\u003c\/p\u003e\n\u003ch4\u003eHow do I remove a damaged channel knob before installing the Motorola PMDN4101AR?\u003c\/h4\u003e\n\u003cp\u003eFirmly pull the old knob straight up off the metal shaft. Clear any debris from the shaft before pressing the new \u003cb\u003eMotorola PMDN4101AR\u003c\/b\u003e into place.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e1-year manufacturer's warranty.\u003c\/p\u003e","brand":"Motorola","offers":[{"title":"Default Title","offer_id":48890240467118,"sku":"PMDN4101AR","price":7.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0062\/0845\/4744\/files\/PMDN4101ARb.png?v=1786110999","url":"https:\/\/www.atlanticradiocorp.com\/products\/motorola-pmdn4101ar","provider":"Atlantic Radio Communications Corp. ","version":"1.0","type":"link"}