2 sets [Brand] Benlera [Batteries Included] Yes [Material] Plastic [Number of Batteries] 1 CR2032 battery (included) [Compatible Devices] iOS devices only, not compatible with Android [Battery Life] 365 days [2025 Latest Model & Industry's Smallest Ultra-Lightweight AirTag] With years of experience in smart tag development, we offer a 29mm square loss prevention tag completed using the latest technology. This latest model features a compact and ultra-lightweight design, unlike the larger ones of 33mm or more. [Reliable MFi Certified Product & GPS Worldwide Tracking Tag] This air tag has obtained MFi, the official certification of Apple, ensuring compatibility with iOS devices. Using the "Find My" network of iPhone, iPad, and Mac, the loss prevention tracker accurately locates items worldwide, regardless of distance. The location of the item is instantly displayed on a map, and you can easily check the directions, distance, and estimated time of arrival to your destination. [Lost Item Prevention Tag & Protecting Privacy] Using cutting-edge tracking technology, it provides accurate, real-time location information. When the smart tag goes out of range of your iPhone, you will receive an immediate notification on your iPhone, alerting you to the possibility of loss. This allows you to secure valuable time to retrieve your important items. With a built-in NFC function, even if the smart tag is lost, the tag will be locked when "Lost Mode" is turned on. When someone finds the smart tag and holds it to the back of their smartphone, the NFC function activates, and the owner's contact information is automatically obtained. [Find by Sound & Long-Life Battery Replaceable] This air tag is equipped with an 80~100dB high-volume alert function, allowing you to quickly find it by playing a sound from the app when lost. Even if you drop it at the bottom of your bag or in the gap of the sofa, you can confirm its location with a loud sound. The smart tag's battery has a long-life design, does not require charging, and uses a CR2032 button battery that can be purchased at convenience stores, etc.