Happymodel X12 AIO 5-in-1 12A (ELRS 2.4G + OpenVTX)

Specs verified by direct manufacturer fetch; no price on manufacturer page, so lowest direct-fetch-verified reputable retailer used (Pyrodrone ELRS variant $83.99, out of stock at fetch; PNP variant $78.99 in stock; Banggood lists ~$72.99 via search index). Record = ELRS 2.4G receiver variant; FrSky/PNP variants exist. F411, gyro varies by revision (ICM20689/BMI270/ICM42688P; V2.3 LSM6DSV16X); 12A continuous / 15A 3s peak ESC, DShot300, Bluejay-flashable; integrated 5.8GHz OpenVTX 0/25/100/400 mW (U.FL) - also fills video and RC link roles. FC-side power draw estimated; VTX at 400 mW adds load beyond that. size_classes derived 2026-08-02 from voltage and comes out EMPTY, which is the positive answer 'none of the size classes on offer': 1-2S never reaches 4S, so the smallest class we build (5in, at 4S) is already above it. A whoop-class board, honestly recorded rather than forced into a class it cannot fly. esc_firmware_family/firmware_flashable recorded 2026-08-03. The note's "Bluejay-flashable" is a CAPABILITY, not what runs, and the two are different fields: Happymodel's own X12 page gives the factory image as "Z_H_30_REV16_7.HEX" — a BLHeli_S rev-16.7 target — and names Bluejay only as an alternative to flash TO ("When use Blujay firmware with 48khz, should set startup power to 1100/1200"). So family is BLHeli_S and flashable is open. Recording Bluejay here would have repeated the D97 failure of a field describing something false.