The Arduino Uno R3 is a microcontroller board. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz
ELECTRONICS-SALON DIN Rail Mount Screw Terminal Block Adapter Module, for Arduino Uno R3.
This Arduino-Compatible ATmega328P development board has all of the features of the original Arduino Uno with the added benefit of an ISP header and CH340G USB interface. This development board can be programmed over a USB B cable using the Arduino IDE: Just plug in the board, select Arduino UNO from the board menu and you are ready to upload sketches. You can power the Board over USB or through the barrel jack.
Arduino Uno R3 Compatible ATmega328P CH340 USB Microcontroller Board
Arduino Uno R3
Arduino Uno R3 USB Microcontroller - RobotShop
Arduino Uno - R3 – Karlsson Robotics
Arduino Uno R3 Microcontroller
Uno R3 SMD with CH340 USB - ProtoSupplies
Arduino Uno - R3 SMD - DEV-11224 - SparkFun Electronics
What is an UNO R3 (Arduino Compatible) Board?
