The service is prompt and price fair. I am a returning customer. The adventure lights are terrific for my retrievers. I put the lights on their collars (the belt clip slips over the collar easily), turn on the lights, and let them outside to run on my back 40. The lights are bright enough that I can easily see the dogs from hundreds of yards away--whether the dogs are running or standing still. Red is the hardest to see distant, so I will not order that again, but the other colors help me identify which dog is where.