Compatible with 2G/3G/4G network. Supports dial-up, telephone call, SMS, TCP, UDP, MQTT, DTMF, HTTP, FTP, etc. Supports GPS, BeiDou, Glonass, GALILEO, QZSS, LBS base station positioning. Onboard USB and UART interface, for dial-up Internet access, cloud platform communication, GNSS positioning, etc. Castellated holes with immersion gold design, small size, easy to integrate into the device by soldering directly or inserting via the pin header.