Feature:1. 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.2. 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.3. MFi Certification: The Airtag project has passed Apple\u0027s MFi certification, ensuring the quality and safety of the product.4. 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.5. 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\u0027s location, allowing you to find items at close range easily.Specification:Specification:Optional Model: 1-Pack / 4-PackOptional Color: White / BlackShell: ABS material, environmentally friendly and sturdyBluetoothversion: 5.2 Battery: Replaceable CR2032 coincell batteryBatterycapacity: 230mAh Standby time: 10-12 months Batteryweight: 3.1g Sensor: Accelerometer Speaker: Built-in buzzer Sound: 60~70dB Product Size:38.6*32.1*8.95mm Product Weight: 7g .Package List:4 x Tracker