Now I am see my black dog in the dark in the house and outdoors when we go for a walk.I was concerned it might not fit our extra small dogs, but collars are adjustable enough. Very happy about purchase. Bought a blue and pink (one for each) so I can see where they are at night.Best one for a small dog. Long lasting charge, light weight and well made. Better than the others that I have ordered. I bought 3 of them !!!Doxies are black and tan. Cannot see easily when it is dark. Now I can.I ordered the size small for my 13 lb dogs. The light is very bright.Love it! Very very bright and so easy to used. Worth the money. Thanks. I have friends and family are going to order??Love the collar. So far so good even in the water. The light doesn't seem to bother her at all at night. Fast charge highly recommend.these work so nice. I bought one for my large dog so I could see her in the middle of the night when I take her out to go potty. It works just great. Now I know exactly where she is in the yard. I also bought two more for my two puppies. I luv them, and strongly recommend one if you have a dog you take out in the dark.I ordered the green neon collar, as believe it is more visible in the night light. This collar has worked well so far and doesn't seem to be distracting for our dog. She' 18mths old but a very small breed, with a thick coat, so this works well when walking her in dusky/dark evening conditions. Very pleased with it and would recommend to anyone looking for a durable collar, that provides visibility and can be recharged, avoiding waste!I wasn't sure about this collar when I came across it as I wasn't sure how it worked, but it's absolutely amazing! It's really bright and so lightweight and flexible. We used it for the first time this evening and I'm really impressed. Our other dog has a different light-up collar, but when that one fails I'll buy him this one. Highly recommend.Unfortunately the collar I purchased immediately lit itself up and drained the battery as soon as I took my dog out in the rain. The off button was unresponsive and only when it had fully dried was I able to recharge it and use it as intended. I checked the charging port cover was in place which it was but it did it again yesterday when he dived into a pond. When it works it lights up beautifully but in the UK we have more wet days than dry most of the time.4th October it has now stopped working completely. Disappointed at the lack of response to this from the sellerI had previously tried a separate light up collar which was ok but had its drawbacks. This one, on the other hand, is perfect. Even without its ability to light up it would be a great collar meaning no compromises were made to include the LED technology. Sturdy, well built and eye catching it ticks all the boxes.Bought it to my chihuahua dogs. Fits well, I think is comfortable as my dogs doesn't pay attention to it at all. I bought orange, pink and green collar. They all are bright and very clear visible at night, however the brightest is green collar. Very happy with purchase