C51 4 Bits Electronic Clock Electronic Production Suite DIY Kits

C51 4 Bits Electronic Clock Electronic Production Suite DIY Kit. 
 
Feature: 
0.56 inch special red digital clock for display. 
Import AT89C2051 for master chip. 
1.2mm thick PCB made from military grade FR-4 board. 
Accurate travel time, travel time error range error -1 to +1 seconds every 24 hours. 
  
Description: 
AT89C2051-based of four electronic clock kit; 
Supply voltage: 3V  ~ 6V; 
PCB Size: 52 x 42mm; 
 
Function: 
Seconds correction (for precise School); 
Switch to every minute independent display interface whole point of time (8-20 o'clock chime can be turned off); 
Two alarm settings (you can turn off the alarm function); 
 
Package included:  
1 x Electronic Clock DIY Kits; 
 
Note: 
This produce is DIY kits, not the end product! You need to have some electronic knowledge and ability. 
We don't supply EN manuals.