Press the SOS button and the tracker will send out a text message containing your exact coordinates. * This miniature GPS tracker is very compact and easy to carry. * It is smaller than a set of car keys so it"s convenient to just toss in any jean pocket or thing. * Virtual perimeter with SMS text alert when you move outside the predefined area. * This tracker is IP67 Waterproof which allows total submersion up to 8 meters deep.