{"product_id":"flysky-fgr4b-2-4ghz-4ch-afhds3-enhanced-rc-receiver","title":"Flysky FGr4B 2.4GHz 4CH AFHDS 3 Enhanced RC Receiver","description":"\u003c!-- SOP:v1.7 | 2026-09-05 | executor:Sidekick --\u003e\n\u003cp\u003eThe \u003cstrong\u003eFlysky FGr4B\u003c\/strong\u003e is a compact 4-channel enhanced receiver built on the \u003cstrong\u003eAFHDS 3 protocol\u003c\/strong\u003e. Unlike the entry-level FGr4S, the FGr4B features an \u003cstrong\u003eexternal single antenna\u003c\/strong\u003e for improved placement flexibility and signal reliability. It supports \u003cstrong\u003ePWM, PPM, i-BUS, and S.BUS\u003c\/strong\u003e output modes and is fully compatible with all AFHDS 3 transmitters. At just 17 × 29 × 16mm and 6.4g, it is one of the most compact receivers in the Flysky AFHDS 3 lineup.\u003c\/p\u003e\n\n\u003cdiv id=\"toc\" style=\"background:#f5f8fc;border:1px solid #dde4ed;border-radius:8px;padding:16px 20px;margin:20px 0;\"\u003e\n\u003cp style=\"font-weight:700;font-size:15px;margin:0 0 10px;color:#1A2B3C;\"\u003e📋 Contents\u003c\/p\u003e\n\u003col style=\"margin:0;padding-left:20px;line-height:1.9;color:#1A2B3C;\"\u003e\n\u003cli\u003e\u003ca href=\"#key-features\" style=\"color:#1A2B3C;text-decoration:none;\"\u003eKey Features\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#review-video\" style=\"color:#1A2B3C;text-decoration:none;\"\u003eReview Video\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#gallery\" style=\"color:#1A2B3C;text-decoration:none;\"\u003eGallery\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#specifications\" style=\"color:#1A2B3C;text-decoration:none;\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#compatibility\" style=\"color:#1A2B3C;text-decoration:none;\"\u003eTransmitter Compatibility\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#package-includes\" style=\"color:#1A2B3C;text-decoration:none;\"\u003ePackage Includes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#related-reading\" style=\"color:#1A2B3C;text-decoration:none;\"\u003eRelated Reading\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"key-features\" style=\"scroll-margin-top:100px;\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eAFHDS 3 Protocol\u003c\/strong\u003e — 3rd-gen Flysky 2.4GHz with bidirectional telemetry and excellent anti-interference\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eExternal Single Antenna\u003c\/strong\u003e — repositionable antenna for optimal signal routing in tight installs vs fixed built-in designs\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e4 Channels \/ Multi-Output\u003c\/strong\u003e — PWM, PPM, i-BUS, and S.BUS selectable output modes\u003c\/li\u003e\n\u003cli\u003e␅ \u003cstrong\u003eUltra-Compact Form Factor\u003c\/strong\u003e — 17 × 29 × 16mm, 6.4g; fits in the tightest RC car and boat builds\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eWide Input Voltage\u003c\/strong\u003e — 3.5–9V DC; compatible with most RC power systems\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eOnline Firmware Update\u003c\/strong\u003e — update via transmitter without PC connection\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eFailsafe Protection\u003c\/strong\u003e — configurable out-of-control protection\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eRSSI Telemetry\u003c\/strong\u003e — real-time signal strength feedback to transmitter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align:right;margin:8px 0 24px;\"\u003e\u003ca href=\"#toc\" style=\"font-size:13px;color:#FFBF00;text-decoration:none;\"\u003e↑ Back to Contents\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"review-video\" style=\"scroll-margin-top:100px;\"\u003eReview Video\u003c\/h2\u003e\n\u003cp style=\"text-align:center;margin:15px 0;\"\u003e\n\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/PeEy1xoZctk\" title=\"Flysky FGr4B AFHDS 3 Enhanced Receiver Review | SoarSky\" style=\"max-width:500px;width:100%;aspect-ratio:16\/9;border-radius:8px;border:0;\" loading=\"lazy\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003c\/p\u003e\n\u003cp style=\"text-align:center;color:#666;font-size:13px;margin-top:-10px;\"\u003e\u003cem\u003eReal-world review: Flysky FGr4B AFHDS 3 enhanced receiver with external antenna\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:right;margin:8px 0 24px;\"\u003e\u003ca href=\"#toc\" style=\"font-size:13px;color:#FFBF00;text-decoration:none;\"\u003e↑ Back to Contents\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"gallery\" style=\"scroll-margin-top:100px;\"\u003eGallery\u003c\/h2\u003e\n\u003cp style=\"text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/FGr4B-1.jpg?v=1788614254\" alt=\"Flysky FGr4B AFHDS 3 Receiver Front View with External Antenna | SoarSky\" style=\"max-width:900px;width:100%;border-radius:8px;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:center;color:#666666;font-size:13px;margin-top:-6px;\"\u003e\u003cem\u003eFGr4B — front view showing external antenna connector and port layout\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp style=\"text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/FGr4B-2.jpg?v=1788614254\" alt=\"Flysky FGr4B Compact Size Dimension Reference 17x29x16mm | SoarSky\" style=\"max-width:900px;width:100%;border-radius:8px;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:center;color:#666666;font-size:13px;margin-top:-6px;\"\u003e\u003cem\u003eFGr4B — ultra-compact footprint: 17 × 29 × 16mm, 6.4g\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp style=\"text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/FGr4B-3.jpg?v=1788614254\" alt=\"Flysky FGr4B PWM PPM i-BUS S.BUS Output Pin Layout | SoarSky\" style=\"max-width:900px;width:100%;border-radius:8px;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:center;color:#666666;font-size:13px;margin-top:-6px;\"\u003e\u003cem\u003eFGr4B — PWM \/ PPM \/ i-BUS \/ S.BUS output pin layout\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:right;margin:8px 0 24px;\"\u003e\u003ca href=\"#toc\" style=\"font-size:13px;color:#FFBF00;text-decoration:none;\"\u003e↑ Back to Contents\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"specifications\" style=\"scroll-margin-top:100px;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"width:100%;border-radius:8px;overflow:hidden;border:1px solid #dde4ed;font-size:14px;\"\u003e\n\u003cdiv style=\"display:flex;background:#1A2B3C;color:#fff;font-weight:700;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;\"\u003eParameter\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003eValue\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eModel\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003eFGr4B\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eChannels\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e4 PWM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eRF Frequency\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e2.4GHz\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eProtocol\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003eAFHDS 3\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eAntenna\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003eExternal single antenna\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eInput Power\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e3.5–9V DC\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eData Output\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003ePWM \/ PPM \/ i-BUS \/ S.BUS\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eDimensions\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e17 × 29 × 16mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eWeight\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e6.4g\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eTemperature Range\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e-10°C to +60°C\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eHumidity Range\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003e20% – 95%\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eOnline Update\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003eYes (via transmitter)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;background:#f5f8fc;padding:10px 16px;\"\u003e\n\u003cspan style=\"flex:1;color:#1A2B3C;\"\u003eCertification\u003c\/span\u003e\u003cspan style=\"flex:2;\"\u003eCE \/ FCC ID: N4ZFGR4B000\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align:right;margin:8px 0 24px;\"\u003e\u003ca href=\"#toc\" style=\"font-size:13px;color:#FFBF00;text-decoration:none;\"\u003e↑ Back to Contents\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\" style=\"scroll-margin-top:100px;\"\u003eTransmitter Compatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with all \u003cstrong\u003eAFHDS 3\u003c\/strong\u003e transmitters and RF modules, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlysky PL18 \/ PL18 EV \/ Paladin EV\u003c\/li\u003e\n\u003cli\u003eFlysky NB4 \/ NB4 Lite \/ NB4 Pro+ \/ NB4+\u003c\/li\u003e\n\u003cli\u003eFlysky PA01\u003c\/li\u003e\n\u003cli\u003eAny AFHDS 3-capable RF module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align:right;margin:8px 0 24px;\"\u003e\u003ca href=\"#toc\" style=\"font-size:13px;color:#FFBF00;text-decoration:none;\"\u003e↑ Back to Contents\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"package-includes\" style=\"scroll-margin-top:100px;\"\u003ePackage Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFlysky FGr4B Receiver × 1\u003c\/li\u003e\n\u003cli\u003eBind Cable × 1\u003c\/li\u003e\n\u003cli\u003eExternal Antenna × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align:right;margin:8px 0 24px;\"\u003e\u003ca href=\"#toc\" style=\"font-size:13px;color:#FFBF00;text-decoration:none;\"\u003e↑ Back to Contents\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"related-reading\" style=\"scroll-margin-top:100px;\"\u003eRelated Reading\u003c\/h2\u003e\n\u003cp\u003eDeciding between Flysky AFHDS 3 receivers? These SoarSky guides cover comparisons, use-case selection, and feature differences:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e📖 \u003ca href=\"https:\/\/soarskyrc.com\/blogs\/technology-sharing\/the-difference-between-flysky-fgr4b-and-fgr4d-receiver\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eThe Difference Between Flysky FGr4B and FGr4D Receiver\u003c\/strong\u003e — external antenna vs dual built-in antenna, IPX6 waterproofing, i-BUS2 and BVD compared\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e📖 \u003ca href=\"https:\/\/soarskyrc.com\/blogs\/technology-sharing\/the-difference-between-flysky-afhds3-receivers\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eThe Difference Between Flysky AFHDS 3 Receivers\u003c\/strong\u003e — full lineup comparison: FGr4B vs FGr4S vs FGr4D and more\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e📖 \u003ca href=\"https:\/\/soarskyrc.com\/blogs\/technology-sharing\/flysky-afhds3-receiver-buying-guide-2026\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eFlysky AFHDS 3 Receiver Buying Guide 2026: 7 Popular Models Compared\u003c\/strong\u003e — detailed side-by-side specs and best-use-case recommendations\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e📖 \u003ca href=\"https:\/\/soarskyrc.com\/blogs\/technology-sharing\/how-to-choose-flysky-afhds-3-fixed-wing-airplane-boat-receiver\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eHow to Choose a Flysky AFHDS 3 Receiver for Boat \u0026amp; Ground Vehicles\u003c\/strong\u003e — application-specific guide for RC cars, boats, and aircraft\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Flysky","offers":[{"title":"FGr4B*1","offer_id":49024013140253,"sku":"202412SID143","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/20210407-IMG_0129.jpg?v=1712833533","url":"https:\/\/soarskyrc.com\/products\/flysky-fgr4b-2-4ghz-4ch-afhds3-enhanced-rc-receiver","provider":"SoarSky","version":"1.0","type":"link"}