Description: 1. Support Rduinoide1.0+ (OSX/Win/Linux) 2. Powered By Usb Or External Power Supply - 5v Or 7-35v (Automatic Selection) 3. Car 500 Ma 5v Voltage Regulator 4. Built-In Usb (And Serial Debugging) 5. 6 I/O Pins (2 Are Used For Usb Only If Your Program Actively Communicates Over Usb, Otherwise You Can Use All 6 Even If You Program Over Usb) 6. 8k Flash Memory (About 6k After Bootloader) 7. I2c And Spi (Relative To ) 8. Pwm On Pin 3 (Software Pwm Is More Likely) 9. 4-Pin Adc 10. Power Led And Test/Status Led (On Pin 0) (Due to different batches, the characters on the product may be different, which does not affect actual use) Material: PCB+Plastic+Metal colour: black Package Contents: 2 x Development Board Modules 2 x Pin Headers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 3.6 I/Opins (2 For USB Support), 8k Flash Memory (About 6K After Bootloader) 5. ADC On 4 Pins, Power Led Indicator And Test/Status Led (On Pin0) 2. There Is A 500mA 5V Regulator On The Motherboard, USB Embedded (Serial Port Debugging) 4. 12C And SPI (VIS ), Pwm On 3 Pins (More Possible With Software PWM) Features: 1. Support Rduinoide1.0+ (OSX/Win/Linux);Can Be Powered By USB Or 5V Or 7-35V (Automatic Matching) Additional Power Supply