Most helpful critical review
13 of 13 people found the following review helpful
Size approximately, 1 inch by 1 inch
on July 20, 2012
Ok ~ so these are quite big ~ approx 1 inch x 1 inch (an important small detail that seems to have been left out). For something like this the size seems to be a litte on the large side.
Batteries are included which is a bonus. Being curious I tried to get the cover off of one to see how the battery is replaced and it was tough. The opaque dome twists so far and then stops - you need to twist it just that but more for it to come apart. The pieces are quite difficult to separate. I had to pry the dome off with my finger nail to separate it.
I also found it nearly impossible to re-align the pieces back to their original position. The little plastic tabs that hold the dome on broke almost immediately as they seem paper thin but it all seemed to hold together once pressed in again.
The second unit was much easier to open.
It seems there is a little empty space behind the battery. This unit fell off in my car (velcro strip Adhesive didn't hold). The led wouldn't switch on. I pulled it apart and had to press the battery in and it worked again. I might place something in that empty space behind the battery to prevent the battery from losing its connection.
It looks quite convincing in the car - especially at night. I'm going to try some 3M double sided tap to hold it in place. Positioning is important. Look at it during the day and night. I found lower down where it gets less light was better.
I have also found that these place in the right position at home can look light a camera or sensor.