TRACKER FUNCTION : Anti-lost alarm can effectively protect your kids, pets or valuables from being lost or stolen within 45 Feet/15M effective distance range, when out of this range your phone and this device will automatically ring for a timely warning SMART & EASY TO SET UP : Locates where you last left your item to the nearest street and then give you the signal strength guiding you to your lost item! Through precise calculation, locate your pet, wallet and etc. via digital display, and you can even locate Your Phone by pressing the button on the gadget it will send the phone a ringing noise until you locate your phone. LONG BATTERY LIFE SUPPORTED : Benefiting from the built-in low consumption Bluetooth 4.0, the battery can last for about 6 Month.