Tiantong Satellite Watch is the world's first wrist-wearable satellite calling watch, enabling direct satellite calls, SMS, and 2.8K IoT data transmission via the Tiantong satellite system. Powered by domestically produced chips and the HarmonyOS OpenHarmony operating system, it features a 1.75-inch AMOLED HD circular display and a built-in omnidirectional antenna. The wrist-worn design keeps hands free, while integrating vital signs monitoring, one-key SOS alerting, track recording, and geofencing capabilities.