The 8G820V40625 is an air conditioner control board manufactured by Dremec. It is designed for Dremec wall-mounted room air conditioners and is used for regulating their electrical components. It features a microprocessor with LED Display and LED Indicator Lights, and provides user-friendly control on start-up, temperature, fan speed, and other air conditioner functions. It also has an LCD display for showing system information, such as running time, energy used, set temperature, and fan speed. Additionally, it has an automatic restart feature that restores your settings after a power outage. This unit is also equipped with a built-in RS-485 port, allowing it to be connected to other company's compatible controllers and sensors.