Walkie-Talkie: Android operating system, supports app downloads and extensions, WiFi and Bluetooth connectivity. Global communication with no distance limits. Built-in SIM card, supports cross-border use, works in 172 countries and regions worldwide. Compatible with communication dispatch platforms. Supports GPS positioning, can track location in real time. Equipped with an LCD HD display. All functions and detailed information are clearly visible. No complicated programming or setup, operation is extremely simple. Clearly picks up human voices, automatically filters environmental noise. Calls remain clear and accurate even in noisy environments. End-to-end communication encryption. Ensures communication security and privacy, prevents eavesdropping. Supports single call, group call, full group call. Group customization and member assignment are supported.