A180 BDS-3 Short Message Mobile Companion is a lightweight individual terminal (80×58×18.4mm). It supports clip and O-ring mounting for belts or backpacks. Compatible with BDS-2/BDS-3 short messaging and single BeiDou positioning. Connects phones via Bluetooth/NFC for BeiDou APP, or operates independently for location reporting and man-overboard alert. Transmits real-time positions via satellite without terrestrial network. Ideal for emergency rescue and field operations when public networks fail.