This slider tag can be attached to your pets .75 wide collar. Open Slot design makes it easier to slide the tag onto an existing collar.These tags, with their tough steel construction and protective polymer coating, work well under outdoor conditions as well as wet locations. Features : Every dynotag comes with a Specially encoded QR code and a special web address that is unique for that dynotag.You simply create your free dynotag account and "Activate" the tag in your account - using that tag's specific "Activation Code".Once activated, the tag becomes exclusively yours and cannot be activated by anyone else! You, and only you, the tag owner, can update the tag contents. Others can only view what you choose to share.Every dynotag has a private web page. Note that any modern web browser can be used to view the tag contents - NO special app or NO QR scanner is required!The QR code is a convenience shortcut: If available, a QR scanner app on a smartphone can be used to scan the tags QR code to view the tag contents on that smartphone's web browser.Our global service: Works anywhere on the planet with Internet.You do not have to be in the vicinity of your tag to update its contents, just sign into your Dynotag account anywhere on the planet and update your tag content as you need - as often as you want.