Arduino is an open-source hardware and software platform where users can create tremendous electronic projects using programming via Arduino IDE, which users need to download directly from Arduino.cc. Since Arduino is open source, ELEGOO got the chance to make the same UNO R3 board which is fully compatible with Arduino. The Upgraded Electronic Fun Kit is used as an extension kit for ELEGOO UNO R3 board or MEGA 2560 board and if you dont have one you can buy one from our store. Component listing:1pcs Power Supply Module WARNING: Pls. do not use the voltage higher than 9V 1pcs 830 tie-points Breadboard1pcs 65 Jumper Wire140pcs Solderless Jumper Wire20pcs Female-to-male Dupont Wire2pcs Pin header (40pin)1pcs Precision Potentiometer2pcs Photoresistor1pcs Thermistor5pcs Diode Rectifier (1N4007)5pcs NPN Transistor (PN2222)1pcs IC 4N351pcs IC 74HC5951pcs Active Buzzer1pcs Passive Buzzer10pcs Button (small)10pcs 22pf Ceramic Capacitor10pcs 104 Ceramic Capacitor5pcs Electrolytic Capacitor (10UF 50V)5pcs Electrolytic Capacitor (100UF 50V)10pcs White LED10pcs Yellow LED10pcs Blue LED10pcs Green LED10pcs Red LED1pcs RGB LED10pcs Resistor (10R)10pcs Resistor (100R)30pcs Resistor (220R)10pcs Resistor (330R)10pcs Resistor (1K)10pcs Resistor (2K)10pcs Resistor (5K1)10pcs Resistor (10K)10pcs Resistor (100K)10pcs Resistor (1M)