LED digital display with hours, minutes, seconds, to minimize the time error accumulation, with second flash function. Set up to 40 ring a bell time, playing with a bell time of data stored in nonvolatile memory to prevent loss of data, power down to individually inspect, modify, delete set of playing time and increase the fight bell ring time. On when the bell time to play the keyboard settings, keyboard, simple design, easy operation. Strong electric drive functions, easy to control the 220V the bell.

jiaoxuedalingxitong.txt

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