The Motorola Defy Satellite Link is a Bluetooth accessory that connects Android and iOS devices to the Bullitt Satellite Messenger platform. It enables two-way satellite messaging, location sharing, and SOS assistance, and is rated IP68 for resistance to sand, dust, and water, meeting MIL-STD 810H for durability. The device includes a dedicated SOS emergency button and a check-in button for sharing location or sending messages, and provides access to 24/7 professional response services from FocusPoint International.