Specifications: Product Dimensions:4.2x1.7x0.5cm CH340G REPLACE FT232RL Operating Voltage(logic level):5V 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 Support USB download and Power Support for external 5V ~ 12V DC power supply Support power supply by 9V battery Simple Operation: 1.Down CH340G Driver CH340G Driver Download link : http://www.5v.ru/ch340g.htm IDE of arduino Download link : http://arduino.cc/en/Main/Software The driver which works for MAC User 'www.wch.cn/downfile/178' 2.Plug in the Nano development board,the driver will install automatically Package Included: 1PC USB Nano V3.0 ATmega328 CH340G 5V 16M Micro-controller board Warranty: 45 days money-back and 12-month, worry-free Guarantee! Gikfun USB Nano V3.0 Micro-controller board is totally safe product which has been certified by USA Federal Communications. Notes: 1.Don't use aged usb cable or aged circuit board to connect Nano V3.0 Board 2.Pull down the usb from computer when no need to upload and download procedures Warning: 1.The product is used for learning and test Code. It's Prohibited for any other purpose. 2.Suit for people above 18 year's old with 1 year electronic diy experience. Or use it correctly under the guidance of electronic specializer. 3.Please wear anti-static gloves or bracelet when operate electronic products. Please keep it in anti-static bag when not use it. Please keep it out of reach of children.