From the website: The industry's smallest, ultra-lightweight AirTag! With years of experience in smart tag development, we've utilized the latest technology to significantly improve upon the Bluetooth chip and design of conventional AirTags. Equipped with a high-precision AI chip! By incorporating a cutting-edge AI chip, the accuracy of location information has dramatically improved, allowing for quick location updates every 5-10 minutes. Evolution to Bluetooth 5.3! Upgraded from the conventional Bluetooth 5.0 to Bluetooth 5.3, which provides a faster and more stable connection. This enables smooth connectivity over a wider range. Amazingly lightweight and compact design! Unlike previous models that were 31mm or larger, this latest model features a compact and ultra-lightweight design. It can be easily attached to small items like wallets and keys, making it ideal for infidelity investigations and managing important belongings. In particular, please use this smart tag to protect your family's safety and reduce daily anxieties.