Longer strap & Adjustable Ratchet for your Moocall device. Use this strap if you have bigger tailed animals and are struggling to close your Moocall with the regular strap. Important: Using a short strap on an animal with a larger tail may result in false alarms due to over tightening. If your ratchet has become worn or damaged and is no longer getting grip on the strap you can replace it by unscrewing it.