DiGiYes 2PCS Multi-Functional Expansion Board Sensor Shield Module Multi-Function Shield ProtoShield with Four Digital Display Compatible with Arduino UNO R3

• Perfectly compatible with 2009, UNO, LENARDO, 2560 and other controllers. Four digital (using 74HC595 driver provincial IO learning SPI), you can do digital display test (can display temperature, voltage, counter value, etc.). 4 LED lights (LED indicator to know the importance of doing in the actual project, with this indicator can work directly with the program status indicators for easy debugging. 3296 Precision adjustable potentiometer, analog input port (can be used to control LED brightness, turn the steering angle, digital voltage, etc.). Three independent keys and one reset key can be used for key experiment (Man-machine Interface).