https://www.electroschematics.com/getting-started-with-the-arduino-multifunction-shield/
Four LEDs
Three pushbuttons
A reset button
A piezo-buzzer
An LED display module (four-digit, seven-segment)
Two serial LED display driver ICs(74HC595)
A multi-turn trimpot (10K)
A port for DS18B20 temperature sensor
A port for TSOP1838 infrared receiver module
A APC220 wireless module interface (serial/UART interface)