Wireless Presenter
Used by 3 peopleamazon.com ↗

“Now for some accessories: I give a lot of talks, so I always have two Kensington Wireless Presenters with spare batteries in my backpack.”
Philip Guo Interview, Cognitive science professor · via Uses This 
“When I'm presenting, I use a Logitech Wireless Presenter Remote thanks to a recommendation from Greg Hoy.”
Lara Hogan Interview, Front-end developer, performance engineering manager (Etsy) · via Uses This 
“You can pry my Kensington remote from my cold, dead, ergonomic grip.”
Matt Might Interview, CS Professor (University of Utah) · via Uses This