A clean and professional design with this small but versatile PCB based on Arduino Pro Mini board. With this card, you can make your Arduino project that can include wireless card like the popular NRF24L01 or WIFI (ESP8266) or Bluetooth HC06. In addition, your project can have a 2x16 LCD, a 4x4 keypad, two servos, a temperature sensor (1-wire) and an internal 3.7v li-po battery. All in one with this customizable PCB. If you consider the time you save for assembling without even thinking to save time of debugging. All that for less than $2 USD!