{"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:v1.8 | 2026-09-14 | executor:Sidekick --\u003e\n\u003cp\u003eThe \u003cstrong\u003eFlysky FGr4B\u003c\/strong\u003e is a compact 4-channel AFHDS 3 receiver with an \u003cstrong\u003eexternal single antenna\u003c\/strong\u003e. That antenna can be positioned around a metal chassis or crowded electronics bay, while PWM, PPM, i-BUS, and S.BUS outputs give you flexibility across RC car and boat builds.\u003c\/p\u003e\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: bold; 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=\"#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\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 — Flysky 2.4GHz third-generation digital system with bidirectional transmission and anti-interference performance\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eExternal Single Antenna\u003c\/strong\u003e — route the antenna for better placement flexibility in tight or metal-chassis installations\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eFour Output Modes\u003c\/strong\u003e — PWM, PPM, i-BUS, and S.BUS output for different receiver and control setups\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCompact Form Factor\u003c\/strong\u003e — 17 × 29 × 16mm and 6.4g for small RC car and boat builds\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eWide Input Voltage\u003c\/strong\u003e — 3.5–9V DC input suits common RC power systems\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eOnline Firmware Update\u003c\/strong\u003e — update through a compatible transmitter without a PC\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eConfigurable Failsafe\u003c\/strong\u003e — set safe channel behavior through the paired transmitter\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eRSSI Telemetry\u003c\/strong\u003e — monitor signal strength feedback on a compatible transmitter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"background: #FFF8E0; border-left: 4px solid #FFBF00; padding: 12px 16px; border-radius: 4px;\"\u003e⚠️ The FGr4B uses a single external antenna and standard i-BUS output. It does not provide the dual built-in antennas, IPX6 coating, BVD, or i-BUS2 features associated with the FGr4D.\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\u003ch2 id=\"review-video\" style=\"scroll-margin-top: 100px;\"\u003eReview Video\u003c\/h2\u003e\n\u003cp style=\"text-align: center; margin: 15px 0;\"\u003e\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\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; color: #666666; 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\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\/20210407-IMG_0129.jpg?v=1712833533\" alt=\"Flysky FGr4B AFHDS 3 Receiver Product View | 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\u003eFlysky FGr4B — compact AFHDS 3 receiver for RC car and boat installations\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/20210407-IMG_0126.jpg?v=1712833533\" alt=\"Flysky FGr4B External Antenna Receiver Detail | 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 — external single-antenna design for flexible signal routing\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/20210407-IMG_0127.jpg?v=1712833533\" alt=\"Flysky FGr4B Receiver Compact Installation View | 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 — compact receiver layout for space-conscious builds\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/FGr4B.png?v=1712833533\" alt=\"Flysky FGr4B PWM PPM i-BUS S.BUS Output Reference | 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, and S.BUS output reference\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/WechatIMG292443.jpg?v=1723301659\" alt=\"Flysky FGr4B Receiver Installation and Connection Detail | 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 — receiver installation and connection detail\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/WechatIMG292443_3e0804a3-1b05-4746-a743-d3ebf24e9472.jpg?v=1723301781\" alt=\"Flysky FGr4B Receiver Wiring and Mounting Detail | 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 — wiring and mounting reference\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0742\/4013\/1357\/files\/WechatIMG292443_50e8abb3-ba8d-4edc-8d9d-9b023fa4f4b0.jpg?v=1723301802\" alt=\"Flysky FGr4B Receiver Size and Connector Reference | 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 — size and connector reference\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\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: bold; 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\u003ch2 id=\"compatibility\" style=\"scroll-margin-top: 100px;\"\u003eTransmitter Compatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with Flysky \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\u003eOther AFHDS 3-capable RF modules\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background: #FFF8E0; border-left: 4px solid #FFBF00; padding: 12px 16px; border-radius: 4px;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e⚠️ Confirm that your transmitter or RF module supports \u003cstrong\u003eAFHDS 3\u003c\/strong\u003e before ordering. The FGr4B is not compatible with AFHDS 2A transmitters.\u003c\/p\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\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\" title=\"the-difference-between-flysky-fgr4b-and-fgr4d-receiver\" 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\" title=\"the-difference-between-flysky-afhds3-receivers\" 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\" title=\"flysky-afhds3-receiver-buying-guide-2026\" rel=\"noopener\"\u003e\u003cstrong\u003eFlysky AFHDS 3 Receiver Buying Guide 2026\u003c\/strong\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/soarskyrc.com\/blogs\/technology-sharing\/flysky-afhds3-receiver-buying-guide-2026\" rel=\"noopener\" target=\"_blank\"\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\" title=\"how-to-choose-flysky-afhds-3-fixed-wing-airplane-boat-receiver\" 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 and boats\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\/es\/products\/flysky-fgr4b-2-4ghz-4ch-afhds3-enhanced-rc-receiver","provider":"SoarSky","version":"1.0","type":"link"}