Features: 2x 2812LED outputs option 5x UARTs, 1x pair I2C1 pads 6x PWM / DShot outputs without conflict 1x Side-press button for BOOT(DFU) mode 3x LEDs for FC STATUS (Blue, Red) and 3.3V indicator (Red) 1x Group of 5V/G/S1/S2/S3/S4 pads for 4in1 ESC Signal/GND 4x pairs of corner pads for ESC Signal/GND connections (DSHOT compatible) 1x 16pin bottom mounted FFC Slot for FCHUB-6S, FCHUB-VTX or FCHUB-W connection