The E10-CPT is designed using the Coherent Population Trap (CPT) method. In comparison with the traditional atomic clock, there is no cavity and the lamp has been substituted with a Laser spectrum lamp. The E10-CPT has low power consumption and miniaturization has been realized in the CPT atomic clock with the procession of MEMS Precise Timing Synchronisation +3.3V DC Input Low Power Consumption Stability to ≤2.0E-10/1s Accuracy ≤5.0E-11 Long Term Stability ≤3.0E-11 External 1PPS Synchronization