Upgraded for R3, 100% compatible, works with software on . Completely resolves the traditional R3 incompatibility with Win7 and instability with Win8 system. Easy to use, with socket pins for wire insertion. Supports both 3.3V and 5V power supply and can meet different IO expansion needs including temperature and humidity sensor, Xbee module, Bluetooth module, RF module, GPRS module, GPS module, LCD shield and so on. Replaces 16u2 3, reducing cost by half, providing greater value for consumers. Color: Photo Color Material: Metal + Plastic Package Contents: 1 x Development Board 1 x Data Cable 1 x Point Needle 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 to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.