It was the right decision. The collar is illuminated as well as the light rings. And unlike the light rings, which can not be opened and therefore always have to be so large that they can pull the dog on the head, this luminous collar can be adjusted to the right size and comfortable by the spring lock to open and close. In addition, you need unlike the light rings no additional collar because the luminous necklace is a real necklace.
Establishments, the collar with 2 CR2032 which can be changed easily. How long I can not say is the battery life, because I have not yet had to change in the 6 weeks, the I have it. Since the collar with LEDs works they should last a long time.
Should swim the dog with the collar certainly not, but rain and snow the battery compartment is tight enough.
I recommend basically always with such light products the color green to buy, because the human eye is most sensitive to green and green is therefore perceived as brighter than red or even blue.