M4 4g LTE usb modem

M4 4g LTE usb modem M4 LTE 4g modem adopts industrial grade design, uses metal box. It can be used in the hostile environment -40~ +48. Support TD-SCDMA/EVDO/WCDMA, support FDD-LTE/TDD-LTE...Provide standard USB interface. It integrates all the commonly used protocols from logical link layer to upper application layer protocols, such as TCP/IP/UDP and so on. It provides a secure, high speed, reliable wireless internet connection for customers. It supports AT Command,