This BayckRC Dolphin AT32F435 3 - 6S 30x30 Flight Controller is perfect for RC hobbyists. Whether you're just starting out or you're an experienced flyer, it's great for all your flying adventures. It measures 38 x 38 x 6.5 mm and weighs 8.9g. It comes with a connector pack. The MCU is AT32F435, it has an ICM42688 - P IMU, a BMP280 barometer, an AT7456E/DJI OSD (UART) for on - screen display, 16M - byte flash memory for blackbox recording, 9 - 28V (3 - 6S) Lipo Vbat input, and dual BEC with 5V/3A & 9V/3A outputs. It has a 30.5 x 30.5 mm mounting size with a 4.1mm height.