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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
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