Logitech's Cordless 2.4 GHz Presenter lets you effectively manage your time during presentations with a built-in and programmable LCD timer. The automatic 5- and 2-minute vibration warnings will let you focus on your presentation, not on the clock. With 15 meters (50 feet) of cordless range, you can move around an auditorium with confidence. No software is required, just plug it in and it works. You'll enjoy extra features like "launch slideshow", "black screen", and volume control, plus an integrated laser pointer. The cordless mini-receiver stores inside device.