The presenter uses drivers that are commonly used USB keyboards and should therefore be used on any operating system without additional driver installation. (Tested under Windows and various Linux distributions)
For this, the following keys of a keyboard are emulated:
In mode 1:
Arrow keys for up / down toggle function like the "Page Up" and "Page Down" key on a keyboard
In mode 2:
Up arrow turns the screen black (button "B") and
Down Arrow switches alternately "Esc" and "F5" to exit or start a presentation. So it happens that you need to press twice the down arrow until the desired event occurs.
Now it is of course so that all programs that can be controlled with the keys on a normal keyboard, can be remotely controlled with the Presenter.
The top knob controls the red laser. The is well focused and also clearly visible on a black background.
The USB receiver can be stowed in the Presenter and uses a USB 1.1 interface (as opposed to specification sheet here). Thus, it is also the oldest computers still usable, of course to USB 2.0 and 3.0 interfaces.
Radio traffic is noisy supplied description on a frequency of 433 Mhz, 2.4Ghz does not claim as here. I had at a distance of 10 meters with a wall in between 24er no reception problems. An advantage over the presenters that send infrared and with which one almost always has problems.
Another purchase decision was that the device is powered by a standard AAA Baterie. So also batteries can be used. I wanted under any circumstances tamper with button cells.
At first glance, the thing so makes a good impression and fits comfortably in your hand. Even up close it does not look too cheap. On the matt black plastic case barely seen fingerprint and it also does not scratch as easily as I thought at first.
The keys click a little noisy, but that does not bother me.
All in all a great unit for the price. I'm very satisfied. Grants must prove itself the only thing in practice and in the long run.