IPX8 Waterproof&SweatproofScrewed-in and waterproof sealing ring structure enhances Airtag's original IPX6 level of waterproof to IPX8. Dogs can swim with it Glow in the DarkMade of long-lasting luminous material, when you take your dog out at night, the airtag holder can glow in the dark to help you track your dog more easily. (NOTE: Only the clear one can glow in the dark) Easy to InstallFlexible installation without piercing to destroy the collar. You can easily use a screwdriver and screws to install the Airtag holder to any position of the collar. NOTES: DON'T over-tighten the screws, stop once you realize it's a bit hard to tighten. Secure and DurableThe high quality PC material is shockproof and drop-resistant, and will not be chewed by pets as easily as silicone. Six screws ensure that the airtag holder can be firmly fixed on the collar and will not dangle around the pets neck. Fits Any Collar WidthThe Airtag dog collar holder supports two types of installation, which can be selected according to the collar material and width. Comes with two different curves of backplate which fit any thickness of the collar.