... quartz clock movement alrm clock movement Radio Controlled Alarm Movement, step movement with LCD CalendarSpecifications:Model NO.: DM7811 (JJY), DM7821(WWVB), DM7831 ... 60KHZ auto change(JJY),77.5KHZ(DCF),60KHZ(WWVB, MSF)2. Operating voltage range:1.3V to 1.6V DC3. Operating ... 20 minutes7. Rectifying times: 5 times/day8. Sensivity:50uV/m(JJY, WWVB),70uV/m(DCF,MSF)9. Alarm Accuracy: 5minutes10. LCD size ...