The garmin inreach messenger is a small, rugged satellite communicator that goes beyond the limits of cellular networks to keep friends and family in reach with global two-way text messaging.Features preset messages to check in with contacts; up to 28 days of battery life; ability to send an interactive sos to coordination center and confirms your messages have been sent.Pair your inreach device with the garmin messenger app on your compatible smartphone to text via satellite or cellular networks.Function: Coomunication/SOSBattery: Rechargeable Li-ionScreen Type: Monochrome/Sunlight ReadableProofs: WaterproofColor: BlackCompatible With: Garmin Messenger App