{"product_id":"uniden-r4","title":"Uniden R4","description":"\u003ch2 style=\"text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.40);\"\u003eUNIDEN R4 REVIEW\u003c\/h2\u003e\n\u003cspan style=\"font-size: 12px;\"\u003eUpdated: 07-13-2025\u003c\/span\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eThe Uniden R4 is Uniden's highest performing single-antenna radar detector\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eProvides advanced digital signal processing (DSP)\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eDual LNA design for extreme performance\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eMRCD\/Gatso detection\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eExtreme sensitivity\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eGPS with red light and speed camera alerts\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eFree GPS database updates downloadable from Uniden\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eQuiet Ride - User set speed auto mute\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eUpdatable via USB connection to PC\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eUniden offers the brightest and most readable full color OLED display available\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eMulti-function display includes voltage, compass, altimeter, time of day\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eK false filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eKA false filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eKa Narrow\/Wide\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eNearly SPECTRE undetectable\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eUnique to Uniden, two different suction cup style mounting brackets included\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eCigarette adapter with MUTE KEY and USB JACK\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eCarrying case\u003c\/li\u003e\n\u003c\/ul\u003e\nThe Uniden R4, while still available, has been supplanted by the WIFI-enabled \n\u003ca href=\"\/products\/uniden-r4w\"\u003eUniden R4w\u003c\/a\u003e, and performs equally to it, but it slightly less sensitive than the \u003ca href=\"\/products\/uniden-r8w\"\u003eUniden R8w\u003c\/a\u003e and \u003ca href=\"\/products\/uniden-r8\"\u003eUniden R8\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003eOur Uniden R4 review demonstrated that the R4 has a sensitivity improvement of about 2 dB or 25%, than the \u003ca href=\"\/products\/uniden-r3\"\u003eUniden R3\u003c\/a\u003e and is similar in sensitivity to the dual-antenna \u003ca href=\"\/products\/uniden-r7\"\u003eUniden R7\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003eHaving more than 14-times the capture distance of a police radar gun, the Uniden R4 provides performance often exceeding all other manufacturers' top performing detectors at considerably less money and is currently the most sensitive single antenna detector we've ever tested!\u003cbr\u003e\u003cbr\u003eThe result is that the Uniden R4 will provide you with more than ample warning of instant on K and Ka band miles away.\u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003eFiltering\u003c\/h3\u003e\nOne of the main benefits of the Uniden R4 is that it now incorporates an LNA for Ka-band as well as an LNA for X-band and K-band for about a 2dB increase in sensitivity over the Uniden R3.\n\u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003eEasy Advanced Programming Video Tutorial \u003c\/h3\u003e\n\u003cdiv style=\"box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.40);width:561px;\"\u003e\n\u003ciframe allow=\"encrypted-media\" allowfullscreen=\"\" frameborder=\"0\" gesture=\"media\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/g9GHejaVa5U?rel=0\u0026amp;controls=0\u0026amp;showinfo=0\" style=\"display:block;\" width=\"560\"\u003e\n\u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003cbr\u003eProgramming your Uniden R4 for the specific conditions you drive is easy. Just press the menu button and you can select from various different options that include the sensitivity, the filtering, the brightness of the display and more.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003eIncluded Accessories\u003c\/h3\u003e\n\u003cbr\u003eYour Uniden R4 comes shipped to your door with everything you need including two windshield mounts--unique to Uniden-- a 12-volt accessory power cable with USB data port, carrying case, and a Uniden R4 instruction manual.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"\/collections\/uniden-radar-detector-accessories-2696\"\u003eUniden R4 optional accessories\u003c\/a\u003e include a hardwire kit for those interested in eliminating the use of the Uniden R4's cigarette power adapter.\u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003eUniden R4 Downloadable Files\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.uniden.info\/download\/ompdf\/R4om.pdf\" rel=\"nofollow\" target=\"_blank\"\u003eUniden R4 Product Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.uniden.info\/download\/index.cfm?s=r4\" rel=\"nofollow\" target=\"_blank\"\u003eUniden R4 Firmware Updates\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003ch3\u003eHave any questions concerning your Uniden purchase?\u003c\/h3\u003e\n\u003cbr\u003ePlease \u003ca href=\"\/pages\/contact-us\"\u003eemail our support team 24\/7\u003c\/a\u003e and we will promptly get back to you or call us during normal business hours to speak directly to one our countermeasure experts.\u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003eWhy Purchase Through RadarBusters?\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cb\u003eExpertise:\u003c\/b\u003e RadarBusters is one of the longest operating and most experienced countermeasure-dedicated companies in the industry. We are not a big box electronics store that offers everything under the sun. You will find no other company that offers the same level of pre- and post-sales expertise, than us.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthorized From Uniden:\u003c\/b\u003e RadarBusters is an authorized affiliate for the Uniden R4, so you can be assured that your detector is the most current model covered under Uniden's full warranty. A Uniden order placed after 2\/3\/25 will be performed as an affiliate link where RadarBusters receives a small commission for the sale to support our operation, rather than a markup from wholesale as was previously done. We greatly appreciate your support via this revised purchasing method.\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eReal Reviews: \u003c\/b\u003eUnlike the other review websites out there, RadarBusters was founded by Radar Roy, a retired cop and certified traffic radar instructor with over 40 years of experience. Luxury Automotive was so impressed with our high standards and qualifications that they dubbed us the “General Schwarzkopf of radar detectors”.\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eNo Sales Tax:\u003c\/b\u003e You will not be charged sales tax as long as your order is shipped outside of Arizona.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWe Have Answers:\u003c\/b\u003e Have a question or concern? Please call or \u003ca href=\"\/pages\/contact-us\"\u003eemail us\u003c\/a\u003e and we will be happy to assist you.  If you think you are having an issue with your product in most cases we should be able to help you resolve it over the phone.","brand":"Uniden","offers":[{"title":"Default Title","offer_id":51275807719657,"sku":"Uniden-R4","price":389.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6222\/1033\/files\/Uniden-R4-2.png?v=1781528951","url":"https:\/\/www.radarbusters.com\/products\/uniden-r4","provider":"Radar Busters","version":"1.0","type":"link"}