1. Battery specifications: CR2032 2. Bluetooth version: V5.1 3. Product material: ABS 4. Product size: 32.5mm 5. Product weight: 6.28g 6. Compatibility: Only compatible with Apple devices, iPad series with iOS 15.0 or above, iMac and MacBook series with MacOS 11 or above 7. As easy to use as Apple AirTag, no need to download APP, you can directly use Apple’s search function 8. Easily track various items and quickly achieve global positioning, just wear it on your umbrella / key / pet. 9. Note: shipped without batteries