4 digits digital clock kit

Model: AH002.
Based on the AT89C2051 four-clock electronic kit
Supply voltage: 3V-5V Recommended: 5V compared to travel time
PCB size: length 52mm * width 42mm

Functions:
1. Seconds correction (for accurate time)
2. It can be switched to the minute and second display interface separately.
3. The full time point (8-20 points, the full time point for 3 seconds, can be closed).
4. Two alarm clock settings (alarm clock function can be turned off)

Kit Features: 1. 0.56-inch clock with a dedicated red digital display;
2. Import AT89C2051 as the master chip; 3. 1.2mm thick PCB made of FR-4 military grade board;
4. Travel time accuracy, travel time error range per 24 hours error -1~+1"