Clock functionality: Uses a performance, lowpower DS1302 clock chip with poweroff hold to preserve time during power loss, ensuring continuous operation in intermittently powered setups. Adjustable brightness: Brightness controlled automatically via a backaccessible potentiometer with small adjustment holes for easy tuning. Advanced music spectrum analysis: 24 frequency bands, a 32bit speed processor, and an AGC module enable detailed music capture and accurate spectrum display, ideal for precision frequency testing. Dual power supply options: Supports USB 5V or 12V input. Use the appropriate supply and port; the 5V USB port is not compatible with 12V input. Compact, integrationfriendly design: A compact PCB module suitable for embedding in enclosures, instrument panels, or lab benches, with solid performance and straightforward wiring. Practical use scenarios: 1) Bench testing of audio equipment (amplifiers, DACs, speakers) with realtime spectrum analysis. 2) Studio or controlroom clock with spectrum visualization for visual feedback during playback. 3) Embedded projects requiring reliable timekeeping and flexible power options, such as digital dashboards or portable audio devices.