Know how busy your dog is, even when you are not around, He"s gone for two hours - how far did he wander? She"s at home alone - did she sleep or wander all over the house? Clips easily onto any collar and can be adjusted for any size dog, just like regular pedometers, Comes with one button cell battery, Maximum count 99,999 steps, Simulate dog"s walking form, Different Measuring Modes Provided, Durable battery included, SKU: GODLG034