The Arduino Uno R3 is a widely used microcontroller board that is part of the Arduino platform. It comes with a variety of features and is suitable for a wide range of projects. When you purchase an Arduino Uno R3 board, it often comes with a USB cable for programming and power. Here are the key features of the Arduino Uno R3:

1. Microcontroller: ATmega328P
2. Operating Voltage: 5V
3. Input Voltage: 7-12V (Vin pin) or 5V (USB)
4. Digital I/O Pins: 14 (of which 6 provide PWM output)
5. Analog Input Pins: 6
6. DC Current per I/O Pin: 20 mA
7. DC Current for 3.3V Pin: 50 mA
8. Flash Memory: 32 KB (of which 0.5 KB is used by the bootloader)
9. SRAM: 2 KB
10. EEPROM: 1 KB
11. Clock Speed: 16 MHz
12. USB Interface: Type-B USB connector

The USB cable provided with the Arduino Uno R3 is typically a standard USB Type-A to Type-B cable. This cable is used for connecting the Arduino Uno to a computer for programming and for providing power to the board.

If you’re purchasing an Arduino Uno R3 and the cable is not explicitly mentioned, it’s a good idea to check the product description or contact the seller to confirm whether the USB cable is included. Most kits or individual Arduino Uno R3 boards are sold with the necessary USB cable.