5Pcs C51 4 Bits Electronic Clock Electronic Production Suite DIY Kits

5Pcs C51 4 Bits Electronic Clock Electronic Production Suite DIY KitsDescription AT89C2051 based of four electronic clock kitSupply voltage 3V 6VPCB Size 52 x 42mmFunction Seconds correction for precise School Switch to every minute independent display interface whole point of time 8 20 oclock chime can be turned off Two alarm settings you can turn off the alarm function Feature 0 56 inch special red digital clock for displayImport AT89C2051 for master chip1 2mm thick PCB made from military grade FR 4 boardAccurate travel time travel time error range error 1 to 1 seconds every 24 hoursPackage included 5 x Electronic Clock DIY KitsNote This produce is DIY kits not the end product You need to have some electronic knowledge and ability We dont supply EN manuals