Simple Digital Electronic Clock Educational Electronic Hobby Kit

Features:AT89C2051-based of four electronic clock kitKit Model: YSZ-4Supply voltage: 3V-6VPCB Size: 52mm * wide 42mmFunction:1. Seconds correction (for precise School)2. Switch to every minute independent display interface3. whole point of time (8-20 o'clock chime can be turned off)4. Two alarm settings (you can turn off the alarm function)Kit Features:A. 0.56 inch special red digital clock for display;B. Import AT89C2051 for master chip;C.1.2mm thick PCB made from military grade FR-4 board;D. accurate travel time, travel time error range error -1 to +1 seconds every 24 hours.Package included:100% Brand New1x Electronic Clock DIY Kits1x ManualThis produce is DIY kits, not the end product! We don't provide technical assistance please make sure you are familiar with the product before purchasing.