Item Type: Development BoardMaterial: PCB Board, Electronic ComponentsSize: Approx. 43.3 x 18mm / 1.7 x 0.7in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1ADVANTAGES: On the premise that the performance of the original board remains unchanged, the USB chip is replaced to increase the stability for win7 and for win8. 2WITH USB CABLE: Equipped with USB cable, the development board supports USB download and power supply, supports ISP download. 3POWER SUPPLY: The development module supports lithium battery and 9V battery power supply, and external 3.3V12V DC power supply. 4STANDARD PORT: With standard digital input and output ports, level serial port transceiver ports, etc. to ensure stable and reliable connection. 5COMPACT SIZE: The development module has compact size, easy to install and develop, with stable performance and less interference. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.