{ "mpn": "SB-F4V4-55-STACK", "maker": { "name": "SpeedyBee (Zhuhai KuaiFeng Technology Co., Ltd.)", "country": "CN", "role": "brand" }, "made_in": "unknown", "price": [ { "qty": 1, "usd": 65.99, "kind": "list", "source": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "as_of": "2026-10-29" } ], "moq": 1, "lead_time": "unknown", "hts": "unknown", "links": { "product": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "datasheet": "https://store-fhxxhuiq8q.mybigcommerce.com/product_images/img_SpeedyBee_F405_V4_Stack/SpeedyBee_F405_V4_Stack_Manual_EN.pdf", "cad": null }, "equivalents": [ "dr-ark-fpv", "dr-matek-h743-wing-v3" ], "pairs_with": [ "dr-iflight-xing2-2207-1855kv", "dr-hqprop-5x4-3x3", "dr-speedybee-bls-55a-4in1", "dr-radiomaster-rp1-v2" ], "maglev": { "custom": "", "directory_ref": null }, "confidence": "VERIFIED", "id": "dr-speedybee-f405-v4-stack", "name": "SpeedyBee F405 V4 BLS 55A 30x30 FC & ESC Stack", "subcategory": "flight-controllers", "brand": "SpeedyBee", "summary": "Very common low-cost Betaflight FPV stack (F405 FC + 55 A BLHeli_S 4-in-1); now marked discontinued by the maker.", "specs": { "processor": { "label": "Processor", "value": "STM32F405" }, "imu_count": { "label": "IMUs", "value": "1x ICM42688P", "num": 1 }, "weight_g": { "label": "Weight", "value": "10.5 g FC (ESC 23.5 g)", "num": 10.5, "unit": "g" }, "interfaces": { "label": "Interfaces", "value": "6 UARTs (UART4 Bluetooth, UART5 ESC telemetry), baro, AT7456E OSD; 3-6S" } }, "sources": [ { "url": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "what": "FC + ESC specs, SKU, price, maker name" } ], "compliance": { "ndaa": "non-compliant", "blue_uas": "not-listed", "fcc": "n/a", "notes": "Store footer names Zhuhai KuaiFeng Technology Co., Ltd. (China; footer also shows Hong Kong). A flight controller from a PRC-domiciled maker falls under NDAA §848 / ASDA. Marked 'Discontinued' on maker store. NDAA FY2020 §848 bars DoD use of UAS whose flight controllers, radios, data transmission devices, cameras, gimbals, ground control systems or operating software are made in a covered foreign country (incl. China) or by an entity domiciled there; FY2024 §1823 (American Security Drone Act) extends this to federal agencies." }, "category": "drone", "subcategory_title": "Flight Controllers & Autopilots", "icon": "fc", "image": { "url": "https://parts.trymaglev.com/img/dr-speedybee-f405-v4-stack.webp", "thumb": "https://parts.trymaglev.com/img/t/dr-speedybee-f405-v4-stack.webp", "source_image": "https://cdn11.bigcommerce.com/s-fhxxhuiq8q/products/226/images/1244/SB_f405mini-12__87958.1696500182.386.513.jpg?c=2", "source_page": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "background": "removed (Apple Vision)", "as_of": "2026-10-29" }, "origin": { "code": "CN", "basis": "hq" }, "hts_resolved": { "code": null, "typical": true, "key": "flight-controllers", "note": "No CBP ruling found in this pass. Not 8807 (Section XVII note 2). Leave unknown until ruled." }, "us_duty_by_origin": { "as_of": "2026-10-29", "rates": [ { "origin": "CN", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "TW", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "VN", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "IN", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "JP", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "KR", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "DE", "duty_pct": null, "possible_pct": 0, "usmca": false }, { "origin": "MX", "duty_pct": null, "possible_pct": 0, "usmca": true }, { "origin": "US", "duty_pct": 0, "possible_pct": 0, "usmca": false } ] }, "url": "https://parts.trymaglev.com/p/dr-speedybee-f405-v4-stack/", "markdown": "https://parts.trymaglev.com/p/dr-speedybee-f405-v4-stack/index.md", "equivalents_detail": [ { "id": "dr-ark-fpv", "name": "ARK Electronics ARK FPV Flight Controller", "brand": "ARK Electronics", "mpn": "ARK-FPV", "category": "drone", "subcategory": "flight-controllers", "summary": "US-built 30.5 mm FPV flight controller derived from ARKV6X, 3-12S input, runs PX4/ArduPilot/Betaflight; Blue UAS Framework listed.", "origin": "US", "origin_basis": "made", "price_usd": 194.99, "price_qty": 1, "ndaa": "compliant", "blue_uas": "listed", "image": "https://parts.trymaglev.com/img/dr-ark-fpv.webp", "url": "https://parts.trymaglev.com/p/dr-ark-fpv/", "json": "https://parts.trymaglev.com/api/parts/dr-ark-fpv.json" }, { "id": "dr-matek-h743-wing-v3", "name": "Matek H743-WING V3", "brand": "Matek Systems", "mpn": "MAT-H743-WING-V3", "category": "drone", "subcategory": "flight-controllers", "summary": "H7 fixed-wing/VTOL flight controller for ArduPilot/INAV with 7 UARTs and CAN; China-made, now hard to find.", "origin": "CN", "origin_basis": "hq", "price_usd": 141.99, "price_qty": 1, "ndaa": "non-compliant", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-matek-h743-wing-v3.webp", "url": "https://parts.trymaglev.com/p/dr-matek-h743-wing-v3/", "json": "https://parts.trymaglev.com/api/parts/dr-matek-h743-wing-v3.json" } ], "pairs_with_detail": [ { "id": "dr-iflight-xing2-2207-1855kv", "name": "iFlight XING2 2207 1855KV FPV Motor", "brand": "iFlight", "mpn": "unknown", "category": "drone", "subcategory": "motors", "summary": "Popular 6S 5-inch FPV motor; low-cost China-made baseline for FPV builds.", "origin": "CN", "origin_basis": "hq", "price_usd": 20.99, "price_qty": 1, "ndaa": "unknown", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-iflight-xing2-2207-1855kv.webp", "url": "https://parts.trymaglev.com/p/dr-iflight-xing2-2207-1855kv/", "json": "https://parts.trymaglev.com/api/parts/dr-iflight-xing2-2207-1855kv.json" }, { "id": "dr-hqprop-5x4-3x3", "name": "HQProp Durable 5x4.3x3 V1S (2CW+2CCW)", "brand": "HQProp", "mpn": "DP5X4.3X3V1S-PC", "category": "drone", "subcategory": "propellers", "summary": "The standard 5-inch tri-blade polycarbonate FPV prop.", "origin": "CN", "origin_basis": "hq", "price_usd": 2.99, "price_qty": 1, "ndaa": "unknown", "blue_uas": "unknown", "image": "https://parts.trymaglev.com/img/dr-hqprop-5x4-3x3.webp", "url": "https://parts.trymaglev.com/p/dr-hqprop-5x4-3x3/", "json": "https://parts.trymaglev.com/api/parts/dr-hqprop-5x4-3x3.json" }, { "id": "dr-speedybee-bls-55a-4in1", "name": "SpeedyBee BLS 55A 4-in-1 ESC (F405 V4 stack ESC)", "brand": "SpeedyBee", "mpn": "unknown", "category": "drone", "subcategory": "escs", "summary": "BLHeli_S 3-6S 55 A 4-in-1 ESC sold as the lower half of the SpeedyBee F405 V4 stack.", "origin": "CN", "origin_basis": "hq", "price_usd": null, "price_qty": null, "ndaa": "unknown", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-speedybee-bls-55a-4in1.webp", "url": "https://parts.trymaglev.com/p/dr-speedybee-bls-55a-4in1/", "json": "https://parts.trymaglev.com/api/parts/dr-speedybee-bls-55a-4in1.json" }, { "id": "dr-radiomaster-rp1-v2", "name": "RadioMaster RP1 V2 ExpressLRS 2.4 GHz Nano Receiver", "brand": "RadioMaster", "mpn": "HP0157.RX-RP1-V2", "category": "drone", "subcategory": "radios", "summary": "2.2 g ELRS 2.4 GHz receiver, the cheap default R/C link on FPV builds.", "origin": "CN", "origin_basis": "hq", "price_usd": 18.99, "price_qty": 1, "ndaa": "non-compliant", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-radiomaster-rp1-v2.webp", "url": "https://parts.trymaglev.com/p/dr-radiomaster-rp1-v2/", "json": "https://parts.trymaglev.com/api/parts/dr-radiomaster-rp1-v2.json" } ] }