The ELRS X2 flight controller comes with integrated SPI 2.4GHz ExpressLRS receiver and 12A Blheli_S ESC which could support 2-4s. Bigger Mosfet could support high to 12A currents would be better for 2-4S toothpick drone or long range FPV drone. And because the 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate and low latency, this flight controller is the one that all Race/Freestyle pilots needed.

Specifications:
Flight controller
MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: MPU-6000(SPI connection)
Mount pattern: 25.5×25.5 M2
Power supply: 2-4S Lipo battery
Built-in 12A Blheli_s ESC each
Built-in Betaflight OSD(SPI Control)
Built-in SPI ExpressLRS 2.4GHz receiver
Built-in 5V 1A BEC
Flight controller firmware target: CRAZYBEEF4SX1280

Onboard 4in1 ESC
MCU upgraded to EFM8BB21
Power supply: 2-4S LiPo/LiPo HV (7v/17v)
Currents: 12A continuous peak 15A (5 seconds)
Support BLHeliSuite programmable
Factory firmware: F_H_40_REV16_8.HEX
Default protocol: DSHOT150/DSHOT300/DSHOT600

Onboard SPI ExpressLRS 2.4GHz Receiver
Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
RF Frequency: 2.4GHz
Antenna: On board SMD ceramic antenna
Telemetry output Power: <12dBm
Receiver protocol:  SPI ExpressLRS
Could bind with ELRS 2.4Ghz TX module(Recommend TX module with latest elrs firmware)

Onboard voltage and Amperage meters  settings
Voltage meter scale setting 110
Amperage meter scale setting 470

Package Included:
1*Happymodel ELRS X2 AIO 2-4S Flight controller

Bind procedure:

1. Connect ELRS X2 flight controller with computer by Plug USB. Running Betaflight configurator and then move on Receiver tab then hit “Bind Receiver”. The Red LED on the flight controller start blinking fast, it means onboard SPI ELRS receiver is in bind mode.
   
   
   
2. Turn on your radio transmitter and running ELRS.LUA v2 version, scroll down the menu and hit [Bind]. The red LED on the flight controller would get solid first and then start to blinking slowly. It means bind successfully. Re-connect the USB and then you will find link was established.