Works, but should be improved

We have the equipment now for 9 weeks in use and a second for 3 weeks. No cat faeces but from day 1 in the monitored areas: needs just in the monitored areas to watch out and the unit align because here is the main weakness.

The monitoring range of the motion is just too small and not sensitive enough. Better would be here a larger receiver one can reduce itself to eg a door "hide" by flaps (from me only by taping or).

If you walk right through a "beam" of the sensor and comes across to the device, the device responds well in 15 meters distance, but it runs exactly between the beams on the device to or away, you can sometimes even up to 4m in front of the unit run without triggers. For a cat the unit safely yet responded "bad". So you have to make sure that the animal marching across the surveillance area and not approaching the device.

Furthermore, the detector reacts badly when aligning it on warm background. When the temperature of the car, asphalt, wall, terrace on which the device is directed or ambient temperature is similar to the body temperature, the device does not respond well.
As far as I am aware this is due to design by the PIR technology, because the report is not static temperature differences in the infrared range. So the problem is not limited to this device.
Bottom line is, if the device now works, or does not come massively to the site and orientation.

The emitted sound can be made audible by a knob (frequency range is reduced in the audible range). The low rate can be better heard not only of people, but also of larger animals such as dogs. Give it a try if an animal does not respond.
I can hear both frequencies (despite advanced age) very good, the higher frequency of nausea trigger me, but you get used to something about it. When should children play the instrument are umbedingt off. According to the description, the device has more than 130dB, I hear it during the day with normal ambient noise even at 25m in PA direction.

More negatively, that a block battery is used which are expensive and the included AC adapter is not weatherproof.