Features: On the premise of ensuring the performance of NANO remain unchanged and the main- control chip ATMEGA328P-AU remain unchanged, we replaced the USB chip to improve download speed and increase stability in Win7 and Win8 8 analog- inputs ports:A0-A7; 14 Digital input / output ports:TX- RX-,D2-D13 Using forAtmel Atmega328P-AU MCU;with 6 PWM ports:D-3, D-5, D-6 D-9, D-10, D-11 1 pair of TTL- level serial- transceiver ports RX- / TX- Using Atmega328-MU/Atmega328-AU(same function), support USB download and Power Specifications: Item: MINI USB NANO V3.0 CH340 Module- Support for external 5V-12VDC power supply Support: power supply by 9V battery Support: ISP download Using Atmega328 -MU/Atmega328-AU Package:With Cable / Without Cable Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is1-3cm Package includes: 1 Set MINI USB NANO V3.0 CH340 Module-