LANMU Fitbit Versa Charger,Smart Watch Charging Dock Station Watch Charging Stand Cradle Holder for Fitbit Versa Smart Watch (black) CH340G Replace FT232RL There is bootloader installed in it 8 analog inputs ports:A0 ~ A7 14 Digital input / output ports:TX,RX,D2 ~ D13 6 PWM ports:D3, D5, D6, D9, D10, D11