Excellent product - not a cheap toy. I am a post-graduate level instructor, as part of a mobile training team - have used these PPT presenter devices for many years. This one is WAY less expensive than the ones I have had in the past - no problems with range (occasionally I am in a large auditorium - in which I move around), the laser is strong and easy to see, the additional on/off switch is brilliant, and it's small and portable. All of us have been disappointed by Chinese rubbish occasionally (which I was kind of expecting based on the price) but this is a professional-grade tool. Many more expensive models have hard buttons for left-right commands - this can be reprogrammed quickly for that. Also has commands for "black screen" from presentation/full screen mode and to switch the slide deck from standard/build mode to presentation/full screen mode. Has a separate low-profile slide switch (well thought out) for on/off - so I no longer have to pull the batteries during travel. Small form factor (not much room in my travel case), USB dongle stores, via magnet, in the tail of the device. Tested/used in a variety of WIN 7/WIN 10 laptops - no problems with drivers/USB dongle recognition. Recommend.
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