The device can simply be placed into a jacket pocket, bag or worn around the neck on the supplied lanyard. In the event of an emergency the SOS button on the front can be pressed and a telephone line over loudspeaker will activate and begin a call through to your chosen SOS contact or the Carephone 24/7 monitoring service. The tracking device itself is small, lightweight and durable as well as waterproof and dust proof so it's ideal for being carried around outdoors. It will automatically send its locations in to the Carephone tracking server at timed intervals and then in the event of an emergency either our monitoring centre staff or your nominated SOS contact can log in to the Carephone Portal and view the devices current location along with it's previous trail of locations. This information can be vital in getting assistance to the wearer in the event of an emergency. Key Features - GPS Satellite Tracking - SOS Alert Button - 2 Way Audio Speakerphone - Small in Size and Light in Weight - Lanyard For Around The Neck Wearing - Durable - Waterproof (IP65 Certified) - Geo-Fence Alarm