Specifications:

• CH340G Replace FT232RL 
• 8 analog inputs ports:A0 ~ A7 
• 14 Digital input / output ports:TX,RX,D2 ~ D13 
• 6 PWM ports:D3, D5, D6, D9, D10, D11 
• 1 pairs of TTL level serial transceiver ports RX / TX 
• Using Atmel Atmega328P-AU MCU 
• There is bootloader installed in it 
• Support USB download and Power 
• Support for external 5V ~ 12V DC power supply 
• Support by 9V battery 
• Support ISP download