IoT-enabled time synchronization and customization: The clock supports a WLAN module to automatically update the time for precise synchronization. The display color and brightness are adjustable, offering high/medium/low/adaptive brightness and a random color cycle for personalized aesthetics and viewing comfort. Display and features: Digital display shows time, date, day of week, and temperature at a glance. Supports 12/24-hour formats. Includes three configurable clocks and four selectable tones to enhance functionality and personalization. Energy efficiency and convenience: Operates from a 5 V DC low-voltage power supply with an average current draw of 250 mA; startup current up to 500 mA. The USB power option makes it portable and easy to power from any USB source. DIY assembly and educational value: Practical DIY kit requiring soldering and assembly, with detailed instructions. Front-side board components are pre-soldered; only back-side components require soldering. Ideal for electronics enthusiasts and teaching, enhancing technical skills and understanding of PCB components. Use cases: - Home or office desk clock with WLAN time sync and customizable ambient lighting. - Classroom or workshop project for hands-on soldering, electronics, and PCB concepts. - Event or lobby display clock with color effects and selectable tones to suit the environment.