This locator is universal for Android and Apple ISO systems. Is there a distance limit? No distance restrictions, globally available, as long as there are any Apple devices within 10-50 meters nearby, the equipment can be fixed in place. Is it real-time? When there are Apple devices nearby, it can achieve the effect of near real-time positioning. In addition, the more Apple devices there are, the more accurate the positioning will be. If there are no Apple devices nearby, positioning is not possible until Apple devices appear nearby (there will be an interval of 5 to 15 minutes for location updates). What is the working principle? The device sends out a secure Bluetooth signal every two seconds, allowing nearby Apple devices (mobile phones, computers, iPads, etc.) to receive and upload to Apple iCloud as a service to generate main location data. Only the owner of the locator can retrieve location data. So there are more nearby Apple devices, the faster the update, the more accurate it is. What places are more suitable for use? It is generally more suitable in busy urban areas or places with more people using Apple devices. Remote areas or places with fewer people using Apple devices are not suitable. Please decide whether to buy based on your own situation. Why is the positioning inaccurate? There may be no Apple devices nearby, and it takes 5-15 minutes to sort out the location. (Bluetooth locators may not be as accurate as GPS, but GPS requires a SIM card, data card, and charging every few days). Our Bluetooth locator has the advantage of using button batteries, which can last for a year without needing to be charged. (1) No extra costs are required. (2) A CR1225 button battery can last for about 2-3 months. Color: Black Material: plastic Package content: 1 x Locator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.