This iFlight Blitz ATF435 E55S 2 - 6S 30x30 Stack/Combo is perfect for quadcopter enthusiasts. Whether you're a beginner looking to explore or an experienced flyer seeking reliable equipment, this product has you covered. The stack/combo comes with an ATF435 FC and 55A 8Bit 4in1 ESC. The ATF435 FC features an MCU of AT32F435CGU7, a BMI270 gyro, a DPS310 barometer, an OSD Chip of AT7456E, 32MB of flash, 6 UARTS, 4 motor outputs via SH1.0 connector, supports Smartaudio / IRC Tramp VTX protocol, has an LED controller and beeper pad. The Blitz E55S ESC has mounting holes at 30.5x30.5mm/4mm, weighs 14.7g, supports 2 - 6S lipo input, has an MCU of G071, a constant of 55 Amps, a burst of 65 Amp, a current sensor, supports various shot types like DShot DShot150/300/600/MultiShot/OneShot etc. The entire unit has a mount pattern of 30.5x30.5mm / 4mm PCB hole diameter, dimensions of 36.5x35 mm, weighs 7.8g for the FC part and comes with a BEC of 5V 2.5A / 9V 2A. It's easy to use and will help you get the most out of your quadcopter flying sessions.