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Time reminding is very important for the speakers,this laser pointer timing by rotating the dial to solve this problem very simply. Speakers can set the time conveniently when they start a presentation.When time is up ,laser pointer will remind them through vibration. As the time setting is very conveniently and quickly, so, the speakers can repeat to set the time to control progress of speech precisely.
Xiangtan University
Xiangtan,Hunan Province, China
Xiangtan University
Xiangtan,Hunan Province, China
Luo Jianping