Upgraded for UNO R3, 100% for Arduino Compatible, works with software on arduino. Completely resolves the traditional R3 for incompatible Win7 and the instability for UNO and Win8 system. Easy to use, with socket pins for DuPont wire insertion. It supports both 3.3V & 5V Power supply and can meet different IO expansion needs including temperature and humidity sensor, Xbee module, BT Bluetooth module, RF module, GPRS module, GPS module, LCD shield and so on. against.<br><br>Replaces 16u2 3, so the cost is halved, consumers get the most income. Colour:Photo Color Material:metal+Plastic<br><br>Package Contents: 1x Development Board 1x Data cable 1x Point needle<br><br>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.