... .7 Certificate:CEFunction requirement:1, Left 2 digital hours,middle 2 digital minutes,right 2 digital seconds,interval use 4 luminescence led2, Time ... ",32",34",36",38",40" and so on can customized How to choose right?Viewing DistanceThe distance between your led clock and ... the high-density arrayViewing AnglesDiodes are capable of outputting light at a variety of angles. Diodes can put out a single ...