Anti-fall and Shake-The case is designed with two ears,can be firmly fixed on any material of pet collars. Full coverage design can avoid noise and shaking during movement.[without airtag] Waterproof Sealing-The new silicone cover seal design allows the airtag holder to be IPX8 waterproof, so you can take your dog swimming. Easy to Install-Simply insert tracker into the silicone case which tightly envelopes it, so you never have to worry about it falling out.(Note: excluding tracker) Easy to Clean-The material is very easy to clean and you can clean it by soap water very easily. After washing, dry it by paper towel then it will work again as new. Real-time GPS Dog Tracker- Dog Collar Holder for Galaxy Smarttag2 enables real-time GPS tracking, offering pet owners peace of mind as they can keep up with their pet's whereabouts and also review location history whenever necessary. Warm NOTE: Christmas is coming and we will include a Christmas card that you can give to your friends or family as a Christmas giftBy the way: Merry Christmas