CH340 chip driven official description WINDOWS driver USB to serial CH341 CH340 installation packageSupport For WINDOWS 98 ME 2000 XP Server 2003 VISTA Server 2008 Win7 Win8 Win8 1 32 Bit 64 and for MACThrough Micro0soft s digital signature authenticationIn the computer end of the USB device emulation as a standard serial devices Serial COMIt contains the serial number and identification CH34X monitoring CH34X equipment swap library Driver http en doit am CH341SER zipFeature Wireless 802 11 b g n standardSupport STA AP STA AP three operating modesBuilt in TCP IP protocol stack to support multiple TCP Client connections 5 MAX D0 D8 SD1 SD3 used as GPIO PWM IIC etc port driver capability 15mAAD0 1 channel ADCPower input 4 5V 9V 10VMAX USB poweredCurrent continuous transmission ≈70mA 200mA MAX Standby 200uATransfer rate 110 460800bpsSupport UART GPIO data communication interfaceRemote firmware upgrade OTA Support Smart Link Smart NetworkingWorking temperature 40 ℃ 125 ℃Drive Type Dual high power H bridge driverNote We don t offer any supports sorry for the inconvenience Package included 3 x NodeMcu Lua ESP 12E WIFI Development Board