Model Number: SpeedyBee F405 V3. Full Functionality: With a built-inBluetooth-Compatible chip, this FC&ESC FPV stack enables complete wireless tuning with Betaflight. 50A 4-in-1 BLHeliS ESC: Equipped with four synchronized 50A outputs, this ESC provides sufficient current to drive the most powerful 6S/4S motors available on the market.