Keyestudio Uno R3 is a board based on ATmega328 microcontroller, fully compatible with Arduino Uno Rev3 .
It has 14 digital input / output pins (6 of which can be used as PWM outputs), 6 analog inputs, a USB connection, a power connector, 2 ICSP headers and a reset button. It contains everything you need to support the microcontroller; simply plug it into a computer with a USB cable or turn it on with an AC to DC adapter or battery to get started.