Quite bright but comes detached when in use. Otherwise good product.

terrible

i ordered 3 of these for my dogs,they arrived eventually and seemed reasonable.but once connected to the batteries they seemed to be able to switch off and on with the movement of the dogs.not handy if they are running around in a field out of vision.would not recommend these at all.

Not Great

I found the device very difficult to turn to the right position so that the light was bright enough to see. Once I got it to the right position my dog had it on for roughly 10mins before doing a big body shake and the bottom half went flying off leaving only the key ring clip and half a bone.

Great idea, bad in reality

I bought two of these, great price I thought! However, the end with the address holder (unnecessary as it's law to have a collar tag) is just a push in rather than screw in, and comes off easily. My puppy had it in his mouth (thankfully I got it before he swallowed it), and if it doesn't fall immediately it only flashes sporadically. Today I tried the 2nd one in case the first was rogue but the half still fell off after two minutes. Really not worth the effort of buying, a danger as dogs can easily swallow. Don't waste your money or time.

poor design

Became unscrewed at first use.