Works great! I can see my puppies at night!
598201
So far so good, have had these for 1 week.  Bought 2 medium size for our 1 and 3 year old puppies (viszla and britney). We leave their regular collars on and put these over them as we didn't bother to custom size per the instructions. Battery seems like it shouldn't be too hard to replace--will update when that occurs.

We only put them on when we take them to the park at night. Clearly not meant to be a main collar as others have noted--it involves wires that could loosen eventually (another reason I didn't bother to custom size in case I need to rewire). Has the ability to blink or be solid lit; we leave them on the solid light. When it's dark out we can't see our Vizsla at all without the collar--the collar just floats through the air like a ghost! They work perfectly--no need to wonder where they've run off to ahead of us.
4576043
I love it! my little dog is dark brown and I can't see what she is doing at night. this is very handy!!
3536369
I got these collars in the mail yesterday, I've used them the past 2 nights and they work great. It's so neat being able to see the dogs lights bouncing at night. Very useful. The product seems great so far, no complaints. Does the job and cheap
4704656
I love this LED light, it's great for helping see my dog out in the woods late at night. The only downside is that the batteries die really quickly. They are easy enough to replace though. I would highly recommend this for anyone who has a dog who likes to wander a bit at night, just so you can easily spot where they are in the yard.
1394986
My dog loves to be outside in our big yard - what ever the weather, day or night.  She blends into the dark, and is not a barker, so the only way I know if she is ready to come in is to open the door.  At minus temperatures I want to keep this to a minimum!  I love this light because I can see where she is at a glance, and know when I can't see her, she is at the door, ready to come in.  I also turn it on when we are walking at night.
2998588
This is a great night vision monocular ! i used it in our hallway in the pitch dark ( lights off of course) and could read anything and everything! the eye piece is also adjustable so you can focus in more for a clearer image! the Infrared on it is Amazing!! i can't wait to start watching the night animals with this device! so glad i purchased this one! i highly recommend it!
3563868
Works great for my dogs during restless nights, storms and fireworks! I've used for my dachshunds as well as my 130lb lab!
2236999
This light is fantastic!  We love camping, and love bringing our dogs.  When we recently got a new puppy we purchase this light so we could keep track of it at night.  The light works great, and we always know where the little guy is.  We love it so much we decided to order a second one in a different color for our adult dog so we can keep track of both of them
1041830
I have a dog that likes to go out around 10PM at night and it is pitch black in my backyard. This makes it easy to go out with her and keep her in my sights. Works great and is very bright.
4674096
I love to be able to see my black dog out in the yard at night! I set it to blink, you can set it on steady red, but I can find the blinking light faster. Plus, what in nature has a red blinking light? Except Rudolph, of course...  :)
PS: mine went through batteries fast, so just order extras right away, they're only 5 bucks or so, for 20 batteries.
3529284
I love these and plan to order more.  I placed one alongside my house which is dark at night and that is where my dog likes to retreat.  Now I can see what she is doing.  An added plus is that it casts a faint light in normal mode which acts as a night light of sorts to the guest bedroom. I like that it goes on automatically at night and stays lit, but when I or the dog walks nearby it lights up brightly.
2269366
Great solution for dark part of my yard so that I can see my dog at night. Works every time the dog walks over there and it's a good brightness. Had ordered one just to test it out but I just ordered another for another dark part so now I'll see the dog in any part. Also, good for home security. Highly recommend.
2405357
With the sun setting earlier my dog walks are going to be in the dark, so I wanted a way to really stand out in the dark.  My dog is very small (9 lbs) so I bought the small collar.  It is a little bulky, but she doesn't seem to mind!  It came with a USB charging cable which is super easy to use.  The switch to turn the light on is very easy to use.  It is SUPER bright!  If you press the button once it stays on continuously, press it again and it flashes, press it again and it flashes at a different speed.  The collar is a little bit thick which made it tough to adjust - but once I got it adjusted it hasn't changed size at all. I kept the dog outside with me on Halloween night and the collar was on the entire time - several hours - and it hasn't dimmed at all yet - I'm not sure how log one charge will last but so far so good!  Overall I think this is a great product - definitely helps with keeping my pup visible at night (or in the snow - little white dog, where'd she go?)
1677706
Great fo seeing where my dogs are when out at night in dark yard.  Although they are only out for a few minutes to do there business it's good to be able to see them.
235521
The quick response from Mpow helped me to share with you this product is worth the money. Where our dogs go out at night is lit very well and the light goes off automatically when they come back in. Thank Mpow for all your help!
4399706
Got the white because i read it was the brightest. I love it! I have a fenced in yard but my dog is an escape artist so i wanted this light to see her at night to make sure she is still in my yard. Works great so far!
3685284
This booster is awesome for my little pups! They are less anxious when they can see out the windows now. I bought one for myself, and one for my friend! I love the tethers for them. It makes me feel that the pups won't go flying if I have to stop quickly in an  emergency.