The Beidou-3 Short Message Portable Terminal (Beidou Box) PD17 is a Bluetooth terminal that supports Beidou-3 Regional Short Message Service, global Beidou positioning, and buzzer alerts. It connects to smartphones via Bluetooth, and when integrated with a dedicated app, enables a range of functions including Beidou RDSS regional short message communication, 4G communication, WiFi positioning, Beidou RNSS positioning, automatic location reporting, and SOS alerts.