Firmware & Protocol: Please note that this flight controller comes with a default protocol is ELRS V3, and use the device with the same protocol to use with this FC so that they can work together. FCs are covered for manufacturer defects. Issues arising from user errors, physical crash damage, damage during installation or dismantling, modifications, power surges, electrical fires, or water exposure are not covered. VTX Power: Higher VTX power consumes more energy and generates more heat, reducing flight time. For better flight time in indoor scenarios, use 25~100mW power. VTX Antenna: Connect and install the VTX antenna before powering on the FC. Alternatively, set transmission power to 0 to avoid burnout. Specifications FC MCU: STM32G473CEU6 Gyro: ICM42688P Blackbox memory: 16MB Sensor: Voltage & Current BEC: 5V, Max. 3A UART: UART 1, UART 2 (For VTX), UART 3 (For RX), UART 4 BetaFlight OSD: AT7456E ESC: 5A continuous RX: Serial ELRS 2.4GHz (V3.4.3) VTX: 5.8GHz 48 channels, Max. 400mW FC firmware: Betaflight_4.5.0_BETAFPVG473 USB port: SH1.0-4Pin Motor plug: JST1.25 Battery connector: BT2.0 Mounting hole size: 26mm x 26mm Weight: 3.92±0.1g Power input: 1S Only Current: 5A continuous, 8A peak ESC firmware: A_X_5_96KHz_V0.19.hex for BB51 Bluejay firmware Digital signal protocol: DShot300, DShot600 VTX Output power: 25/100/200/400/PIT Frequency: 5.8GHz 48 channels, with Raceband: 5658~5917MHz Channel SEL: SmartAudio2.0 Modulation type: FM Frequency control: PLL All harmonic: Max -50dBm Frequency stability: ±100KHz (Typ.) Frequency precision: ±200KHz (Typ.) Channel carrier error: ±1.5dB Antenna port: 50 ? Package 1 * Matrix 1S Brushless Flight Controller 1 * Type-C to SH1.0 Adapter 1 * SH1.0-4Pin Adapter Cable 4 * M1.2*4 Self-tapping Screws 4 * M1.4*4 Self-tapping Screws 4 * Shock Absorbing Balls