This is a smart tag compatible with iPhone's Find My app. The battery is already installed, so you can use it as soon as you receive it. AirTag compatible type. To prevent loss of keys, wallets, bags, etc. ■ How to use Find My App → Add Item → Registration Complete Easy to connect. ■ Contents ・Main unit ×1 ・CR2032 battery (installed) ・Battery replacement pick included ・Simple manual (English) ※Not an genuine Apple AirTag ※Cannot be used with Android Bundling purchases with protective films etc. currently listed for sale is also possible. Please consult via comments or bundle request. If you wish to purchase multiple items, please let us know in the comments. Everything shown in the product images is included. Shipping is planned via Yu-Packet Post mini. Immediate purchase welcome. iPhone Apple Compatible Find My Smart Tag AirTag Compatible Loss Prevention Bluetooth Tracker Key Finder Anti-loss Replaceable Battery