Despite the warning in some reviews, the presenters sometimes unresponsive or skip pages, I bought it to me and tried at home at the desk immediately. Everything worked great.
In the presentation, however, this problem was suddenly. The problem was: the irrecord stuck in the USB slot on the right side of my notebook. At the desk I used the presenter in his right hand and there were no problems. However, during the presentation, I stood on the left side of the notebook and therefore had no direct "line of sight" to the receiver.
However, if one pays attention to place the presenter on the receiver side and a constant "visual contact" has, nothing can go wrong. I personally use the presenter with a short USB extension cable that can be bent into the air and thus granted a permanent "visual contact" between presenter and the receiver.
