AT89C2051-based of four electronic clock kit
Kit Model: YSZ-4
Supply voltage: 3V-6V
PCB Size: 52mm * wide 42mm

Function:
1. Seconds correction (for precise School)
2. Switch to every minute independent display interface
3. 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.

setting, LED flashes the last one, the last one by S2 plus one, between 0 and 9 cycles, digital the greater the faster the clock, press S1 to confirm the setting and return to the clock display. Set.

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