First, the Assembly: the highly resistant blister opens only a good household or poultry shears. The assembly of the unit attachment to the spray bottle is not easy, you have to press on the head and then push down the locking ring with force with one hand. All this without tilting. There are four non-enclosed AAA batteries required, the battery compartment is the top of the head, so that batteries can be change without the spray bottle undock, the battery compartment can be opened and closed without screws. Unsealed There is also a weak point in the continuous rain. Because you should treat the unit a little cap made of plastic film. The motion detector can be adjusted independently of the spray head, you can also adjust the spray height.
The use: To protect of the bed are two SSSCAT units vis-a-vis. This fits quite well with 4m. Even at temperatures below the freezing point to -7 °, the units have not been frozen. Also there seems to be little nuisance tripping. The only problem is that the intelligence of cats is obviously totally overrated. If they can not opportunistically imitate anything to catch food, appears in the upper story hardly a little light to burn. Only a cat shuns now distraught widely our terrain. She has probably picked up several times at close range the "full load". The neighbor asked what we would have done with the cat. As you can likely come from trauma than of classical conditioning. The others have also not yet understood by weeks, that their approach to the border triggers the particularly unpleasant in cold spray. You try it every day several times anew. They do not come to the most successful tactics, namely exactly to approach in the middle between the units the bed because they apparently did not understand when where the spray comes and how far he acts. After all the units trigger quite reliable and the business has to be done elsewhere. Incidentally, the same applies to the Pestbye cats distributor. It is not understood, but the bed is avoided.
Our ultimate conclusion reached in late spring after six months of operation.
Addendum after six months: The cats are gone from us. You avoid the terrain carefully. what more do you want?