PROBLEM TO BE SOLVED: To automatize and save power of works to show a presentation number plate and to measure elapsed presentation time with a stop watch for each presenter, and generate specific notification buzzer which have been done manually in a research presentation meeting.
SOLUTION: This device is constituted of an electric light indicator using a luminous diode 2 in a sheet of printed board 1 and an electronic circuit with a digital integrated circuit element 3. By placing it at a easily visible location in a research presentation meeting place, time is notified to the meeting participants and the presenter. When the presenter started the presentation, the present presentation number is automatically indicated with electric light by operation pressing the start button of an infrared remote controller, and the indication of elapsed presentation time by light and measurement are also initiated. The device is constituted of an electronic circuit so that a notification buzzer is sounded with an automatic speaker 7 when each notification buzzer set time of a preliminary buzzer time setter 4, a presentation time ending buzzer time setter 5, and a question time ending buzzer time setter 6 set in advance of research presentation meeting initiation matches the research presentation times.