Skystars F7 Mini + KM35A Mini is a stack suitable for smaller 2-4" drones. The controller uses a powerful F7 processor combined with a MPU6000 gyro. It includes a 5Vand 10VBEC, a BMP280 barometer, and 16MB blackbox memory. The controllers with BlHeli_S firmware have a current carrying capacity of up to 35A.