GPS Tracker Key finder uses BT 4.0 technology to connect Android, iOS, iPad and other smart phones. Show the lost car key, luggage, wallet, dogs, cats distance from you on the APP to let you find them accurately.APP Remotely ControlDownload free APP then pair it with your smart phone. When you press the remote button, the receiver sounds "beeps" you can hear voices from GPS tracker within 85 ft. 2 pack GPS tracker locator contains black for kids, pets, phone.Remote Camera Function: this key finder wireless smart tracker can be applied as a remote shutter to make selfies more conveniently and easily capture some happy moments; It also helps you take wide angled and nice photos from the front or rear cameras.Two-Way Notification The 2-way key finder will lets you track lost items or be notified when they are out of range with a ring or flash.This feature can be turned off in the app.Location Record LocatorIFindU App has real time location map, and will record the last connected location to help you find it back. so you can open the map in the App to speculate approximate location of your missing items.