【Apple】 To install, you need to download the APP via Bluetooth connection, which is free of charge. Positioning principle: global common (no activation fees, no traffic fees, no card insertion required). FindmyTag can be downloaded from the mobile phone app store and Japanese instruction manual. It can be done easily in 1 minute. *The product turns on when you tear off the transparent paper. 【Industry-Leading Positioning Accuracy】 It is equipped with the industry's highest quality location information accuracy. It supports DoCoMo LTE communication areas and uses GPS satellites, WIFI, and base station triangulation, as well as the error correction system SBAS and an acceleration sensor. It uses the highest technology in the children's GPS industry to inform you of your child's location. *The accuracy of location information may be reduced depending on the radio wave environment and GPS satellite environment, such as underground, inside buildings, inside vehicles, and in the shadow of buildings. You will receive notifications of lost items, which helps prevent loss. Furthermore, you can also detect the last recorded location of the device, and if you accidentally overlook it, you can immediately go back to retrieve your belongings. 【Global Positioning System】 The multi-functional tracker helps you track anything. You can attach it to anything, such as keys, backpacks, and pets. You can find them using a free app on your smartphone. It can be used worldwide, and you no longer need to worry about lost items, children, pets, etc.! 【With Japanese Instruction Manual】 With a detailed Japanese instruction manual, even first-time users can use it with confidence.