Global Compact Tracker for Birds and Pigeons with GPS Technology This locator is compatible with both Android and iOS devices. Is there a distance limit? There are no global distance restrictions. As long as there are devices within 10-50 meters, the device can be located. Is it real-time? When devices are nearby, it can achieve near real-time positioning. The more devices in the vicinity, the more accurate the positioning becomes. If no devices are present, positioning will not be possible until one comes within range, which may result in location updates every 5 to 15 minutes. How does it work? The device emits a secure Bluetooth signal every two seconds. Nearby devices such as smartphones or Macs can detect and upload this signal to iCloud, enabling location data to be generated. Only the owner of the locator can access the location information. The more devices nearby, the faster and more accurate the updates will be. Where is it best used? It is most effective in urban or high-traffic areas where many people use devices. Remote or sparsely populated areas with few users may not be suitable. Please consider your environment before purchasing. Why might positioning be inaccurate? Inaccuracies may occur if there are no nearby devices. It may take 5-15 minutes for the location to update. While Bluetooth-based tracking is not as precise as GPS, this device uses a button battery that lasts up to one year, eliminating the need for frequent charging or SIM/data cards. Key advantages: (1) No ongoing subscription or additional costs. (2) Uses a CR1225 battery, which lasts approximately 2-3 months. Color: Black Material: Plastic Package Contents: 1 x Locator Note: The actual product color may vary slightly due to lighting and screen display differences. Measurement may vary by +/- 1-3 cm.