Included with the 4 smoke detector incl. Battery, instructions and fixing were included, plus another 4 batteries for later replacement. Each smoke detector was individually packaged in a box.
The smoke detectors are the most common round shape and are white. The lower part can turn to swap the battery. Initially, a 9V was inserted here already, but this still packed and not connected. Which is great because so ever goes no "juice" before using lost.
After the battery was angekabelt and the floor was screwed again, I was looking for suitable places in the house. I opted for the hallway, living room, bedroom and nursery. Fixing screws + dowels were supplied, a drilling template. Thus, the detectors were installed quickly.
Well first the smoke detector function test performed. There is a test button on the device, this must be 5 seconds. Does the detector, so you will hear a loud beep long. This is very good to hear, even through closed doors from the first floor to the ground floor. This test should be repeated at regular intervals.
I have disposed of just 4 weeks before our old smoke detectors, as he constantly produces false positives. This new Visor Tech has given at least in the first days no false alarm. I am even glad to have now multiple devices, so you're still on the safer side in house fires, especially as we also have a fireplace.
Should the battery run low, the smoke detector emits silent warning tones to indicate a battery replacement.
So far I think the set very well, it has a super - price - performance ratio. I'll test a few months and then ggfst. Buy the same sets for my rent, so my tenants are on the safe side.
