By now I've ordered three units in which one has ever given up the ghost, but I got a new device on warranty and the service worked satisfactorily.
The laser pointer and coverage will vary Prima and function properly within a radius of 10m.
What I also would like to mention is that the keys are a bit spongy and is a click when pressed hear, but for me personally is not bad because you get immediate feedback from the device and as Kinästhet something to play around during the storytelling has :).
For the price - Tippi Toppi