This locator is universal for Android and Apple ISO System. 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. Moreover, the more Apple devices there are, the more accurate the positioning will be. If there are no Apple devices around, positioning will not be 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 will send out a secure Bluetooth signal every two seconds, allowing nearby Apple devices (mobile for phones, Computer, for ipad, etc.) to receive and upload to Apple iCloud as a Service to generate master location data. Only the owner of the locator can retrieve location data. So there are multiple nearby Apple devices, the faster the update, the more accurate it is. Which 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 purchase based on your own situation. Why is positioning inaccurate? There may be no Apple devices nearby, and it will take 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 one year without the need for recharging. (1) No additional expenses are required. (2) A CR1225 button battery can last for about 2-3 months. Colour: Black Material: plastic Package Contents: 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.