Welcome to our shop! This Multifunctional Expansion Board Kit is designed to seamlessly connect with mainstream controllers such as 2009 for LENARDO 2560 on the market. It features a 4‑way LED indicator light that allows you to easily monitor the working status of the program. The kit also includes interfaces for both DS18B20 and LM35 temperature sensors, allowing you to conduct temperature measurement experiments (please note that the temperature sensor components are not included). The expansion board is equipped with a 3296 accuracy adjustable potentiometer, which provides analog port input for controlling various components such as LED brightness and servo rotation angle. It also includes an infrared integrated receiver for infrared remote control experiments (please note that the integrated receiver is not included). Other features of this kit include a four‑digit digital tube for displaying temperature, voltage, count value, etc., three independent buttons for button experiments, a buzzer for sounding experiments, and interfaces for Bluetooth, wireless communication, voice module, and voice recognition module. It also has a servo interface for convenient steering gear control and an infrared detection interface for connecting with infrared for tasks like human flow statistics. This Multifunctional Expansion Board Kit is made of high-quality resin material and operates at a power supply voltage of DC 5V. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service. Thank you for choosing our shop, and we hope you enjoy experimenting with this Multifunctional Expansion Board Kit!