【Key Rings And Batteries】There are Two Key Rings and Four Batteries inside the Package of Our Tags-4 Pack, Making it More Convenient when You Hang Smart Finder on Your Keys, Wallet, Backpack, Luggage, Etc and Using Longer Time. 【Thoughtful After-sales Service】 If You Encounter Any Problems During Use Our Tracker, Please Feel Free to Contact us. We Will Provide You with Comprehensive After-sales Service.If You Have Any After-Sale Questions You Can Contact Our Yunni Official Website. 【Instantly Locate】The Smart Tracker Allows You to View the Location in Real-Time. Within A Bluetooth Range ,Using The "TUYA" App to Play A Sound and Locate the Position. Loud Sound up to 90-95db. When Distance is Out of Bluetooth Range, Using the Map Navigation Feature in the "TUYA" App to Find the Location of Your Air Tracker. 【Ring Your Phone】Double-click the Button on Smart Finder to Ring Your Phone. This Can Help You Find Your Phone in Seconds,Even If it’s on Silent Mode. 【Ring Smart Finder】Click the Bell Icon in The App to Ring Smart Finder Which Can be Attached to Your Valuable Items Like Keys, Wallets, Purses, Luggage, Cameras, Bikes,Tablets, Backpacks, Etc. Tracker Tags 2 Pack, Luggage Tracking Tags Compatible with with TUYA APP,Both iOS and Android Compatible, Key Finder Locator with Sound,Smart Tag,Item Finder for Keys, Bags, Suitcases ,Black