Features: Global Positioning: With the global positioning feature of the Airtag project, you can easily find your items anywhere in the world as long as there are Apple devices around. One-Click Call: No need to download any software, just open the search software connection on the Apple device, and you can use the device to emit a prompt sound to help you quickly find items. MFi Certification: The Airtag project has passed Apple's MFi certification, ensuring the quality and safety of the product. Ultra-Long Standby: The ultra-low power consumption design can maintain a standby time of up to 10 months, eliminating the need for frequent battery replacement. Precise Search: Through the "Iltems" tag of the Finding App, the built-in speaker of Finein Tag can play a sound to indicate the item's location, allowing you to find items at close range easily. Specification: Optional Model: 1-Pack / 4-Pack Color: White Material: Plastic Bluetooth version: 5.2 Auxiliary functions: Record lost location, rename item, customize item icon Connect: Bluetooth technology for close-range sensing and support for loss mode Alarm volume:Builtin buzzer (> 100 decibels) Battery: Replaceable CR2032 button battery Working temperature:-10~65 Storage temperature: -10~55 Working humidity: ≤85% Storage humidity: ≤75% Operating voltage: 2.0V-3.3V Transmit power: 4dbm Product size: 29*29*11mm Product weight: 7g Package size: 90*64*16mm Package weight: 18g Package list: 4* Tracker