The BCTlabs UNO 16u2 uses an ATmega16U2 chip as a USB-to-Serial converter for the main ATmega328P microcontroller, with drivers available on most systems. It features screw terminal I/Os, 12V DC input with polarity protection and an on/off switch, 5V/2000mA power output, USB-C connector, and is compatible with Arduino IDE and UNO shields—no extra drivers needed.