Timer Cue

 Timer Cue is a powerful device designed for event
 producers and presenters. It offers a wide range of features
 to keep events running smoothly and ensure that
 presentations stay on time.

•  In general, the device has a range of up to 300 meters (1000 feet) in open space,
   and up to 100 meters (330 feet) in an indoor environment.
• Timer Cue can remotely control presentation apps such as Power point, Keynote
   Google Slides, and WPS on four computers.
• Timer Cue provides a range of features designed to help presenters and speakers
   stay on schedule during their presentations, reports, or speeches
• This ensures everyone has a fair opportunity to express their ideas and introduce
   new concepts.
•  Set up your run down in Timer Cue and you get a full screen output for the
   confidence monitor on stage.
•  Besides a simple countdown, advanced options like count-up, time of
   day(clock),time formats(12h/24h),wrap-up colors, and chimes are available.
• Send messages and signals to the presenter on stage. The text automatically
   resizes to fit the full screen output.
• It can be displayed in different colors or flash to grab the attention of the talent on
   stage

Please download the specifications from here