It broke after having it on my dog only once the connector snap broke off :(

Don't buy this. The front fell off after 2 days, very cheap (Then again, what do you expect for $6 lol)

Does not fit the dog collar meant for human to hold firing wslks????

It doesn't appear to have any way to set it for the dog's stride, it's just counting steps. This means that it is going to count 1,000 Chihuahua steps the same as 1,000 steps for a Great Dane. Obviously, a Great Dane will travel a lot farther in 1,000 steps, but this device is counting the distance based on some kind of average rather than the actual stride length of the wearer. If I had an average dog that would be okay, but I have a very tall, long legged Great Dane. So the results are going to be meaningless. I was so disappointed that the device is still in the box on the table by the front door, it never really made it into the house.