The S3 is a multifunctional IoT smart touch panel for home appliance control and visual intercom. This frameless panel has three physical buttons — each with beveled edges inspired by piano black keys, harmonizing style with functionality. The indicator on each button enhances both high-tech allure and utility via its adaptive brightness. The V-0 rated flame-retardant shell has been frosted and sprayed, ensuring utmost safety. Its UI features neumorphic icons, offering animated visuals of appliance status, current weather, and indoor conditions for intuitive monitoring and timely adjustments.