A wireless presenter/laser pointer has two parts, a receiver attached to the computer (usually a laptop) and a transmitter that is about the size of a fat pen. Most wireless transmitters have pocket clips to help keep them handy.
Buttons allow moving forward or backward through your slides in a slide show or in presentation applications like Power Point. The laser spot can be used to direct attention to a specific part of a slide.
A word of caution; bumbling back and forth through your slides is distracting and will quickly lose your audience’s attention. And overuse of the laser pointer will attract attention to the pointer instead of to the points to be highlighted. Also, very few people have such steady hands that they can hold the dot still – don’t try. Point by drawing little circles, not by trying to hold the dot still – especially after the second cup of coffee.
Dave Zielinski, in a TM Magazine dated August, 2009 (pp 22) evaluated three readily available devices. https://www.toastmasters.org/~/media/45DDC567F63A4B94A8A84310C09A8EE4.ashx
Presenter/Pointers are available from office supply stores and from Amazon: http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=laser+presenter+pointer
Toastmasters working on project eight in the Competent Communication manual might find this device invaluable. In fact, some clubs might want to purchase a presenter/ pointer for use by all members during speeches that use projected images.