Satellite communicator lets you send and receive text messages almost anywhere, even when you're out of cell coverage range Interactive SOS signal sends an emergency message to Garmin IERCC staff for 24/7 assistance LCD screen shows you when your messages have been sent and alerts you when help is on the way in emergency situations Rechargeable lithium battery offers up to 28 days of battery life, with enough power storage to recharge a phone if needed Compact, lightweight design and rugged construction make it easy to bring along on any adventure Download the Garmin Messenger smartphone app to access additional features, like group messaging with friends and family Designed to pair with many Garmin wearables, handhelds, and marine equipment (available separately) An active satellite subscription is required to access GPS features