Review on USB Rechargeable LED Dog Collar Light Up Collars - Water Resistant, Cuttable, Glowing Pet Safety Necklace Loop for Dogs - Pink, Green, Blue by Clint Blackman

First and foremost, be careful if you have a neurological disorder such as seizures or migraines/vestibular migraines, as when turned on it goes straight into fast flashing mode, which is almost as bad as a flash, then you have to press the power button again to get the slow flashing mode, then you have to press the switch again to get a steady non-flashing mode. That's the main reason why I only gave 3 stars. The light is very bright and the blinking is completely unnecessary and downright annoying at the very least. And imagine from a dog's point of view wearing that blinking thing around your neck! Also, it's pretty durable for late-night trips or so you can see your dog when you let him potty at night. However, it doesn't take a bunch of dogs or puppies running around and getting into rough play. They are also easy to crop. Just make sure you cut off the right end. They come with 3 chargers and charge quickly. Collars do the job well and are a good investment. I would give this product 5 stars if it weren't for the flashing modes.