I did not receive the left light that is listed in the description. The collars seem to be working and look as described.

Great product, got 2 the light shock is great and only took a week and now we only use the vibrate to keep the dogs quiet. Battery life is good we didn’t have to charge for almost 2 weeks!

So far so good. Used on 7yo beagle mixes who bark at everything. Instantly stopped barking. It's been a fews days and they've improved even while not wearing the collars.

This collar is made of wear-resistant and durable material, and has high-brightness reflective strips at night, which increases the safety of dogs going out, and the simple design of the reflective tape is very beautiful. The collar uses high-quality retractable lights, which are firm and can be adjusted according to the size of the dog, which will give the dog a very comfortable feeling.

These were super easy to set up, turn on, and get activated. I didn't like that the directions don't explicitly explain how to turn off the shock feature, but after I figured it out I was happy. Our house is much quieter already and the dogs respond to only the beep!! I will update if needed, we just started using these 3 days ago and they are on 12 hours a day, turned off at night, and it appears the batteries are keeping up!

I was initially a bit dubious about how effective this would be, but thought that for the price it was worth trying. Glad I did. Worked very quickly to reduce barking by my German Shepherd (who would previously bark loudly if anyone was on the phone - not helpful when you are on conference calls!). I am selective when I use it (happy for him to bark to e.g. announce visitors) so just put it on when I need him not to bark - and for that it has worked well. Wondered if the two prongs might be uncomfortable, but I have seen no sign at all that they bother him whilst wearing the collar. Based purely on my personal experience with my own dog...