The Stone - A Button To Find Your Phone, Text Eta, Emergency Call or Control Your Camera - Glacier The stone is a shortcut to your phone and other smart devices Text, make calls, take pictures, play music, find your phone and more with the press of a button Can receive alerts from it's motion sensor, temperature gage and range finder Replaceable battery, water resistant and crowd GPS if it gets lost Compatible with IOS 9.0 and android 5.0 or later