It seems like you’re referring to the Arduino Nano board that doesn’t come with a USB cable. The Arduino Nano is a compact and versatile microcontroller board based on the ATmega328 or ATmega168. The Nano is similar to the Arduino Uno but in a smaller form factor.

When you purchase an Arduino Nano without a cable, it typically means that the USB cable needed for programming and power is not included in the package. The USB cable is a standard USB Type-A to Mini-B or Micro-B cable, depending on the version of the Nano.

Here are the key features of the Arduino Nano:

1. Microcontroller: ATmega328 or ATmega168 (older versions)
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: 8
6. DC Current per I/O Pin: 40 mA
7. Flash Memory: 32 KB (of which 2 KB used by the bootloader)
8. SRAM: 2 KB
9. EEPROM: 1 KB
10. Clock Speed: 16 MHz
11. USB Interface: Yes (Mini-B or Micro-B, depending on the version)
12. Size: Varies slightly by version, but generally around 18.5 mm x 43.2 mm

When purchasing an Arduino Nano without a cable, make sure to acquire a suitable USB cable separately to connect the Nano to your computer for programming and power. The cable you need will depend on the specific version of the Nano, so check the product description or documentation for the correct type of USB cable.