Features: Completely solve the traditional UNOR3 board win7 and win8 system is not compatible with the above instability. Especially in the pirated 64-bit WIN7 system, the official board can not be installed driver, and this version is very simple and easy to install. Download the program simple and convenient. You can simply use the sensor, a variety of electronic components connected (such as: LED lights, buzzers, buttons, photoresistors, etc.), to make all kinds of interesting works. Increase the pin socket, easy to use DuPont line. Replace the 16u2, so that the cost reduced to half, consumers get the most benefits. The use of high-speed microprocessor controller (), the development of user interface and environment are very simple, easy to understand, very suitable for beginners to learn. brand new and high quality Specifications: Type: without cable, with cable (optional) I / O digital input / output terminals 0 ~ 13 I / O analog input / output terminals 0 ~ 5 Support ISP download function Input voltage: connected to the computer USB without external power supply, external power supply 5V ~ 9V DC voltage input Output voltage: 5V DC voltage output and 3.3V DC voltage output Using Atmel microprocessor controller Package Includes: 1 x UNOR3 Development Board note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!