WL-M303 family industrial4G/3G cellular Modem with USB interface is the modem that provides SMS and dial-up function by mobile Cellular network cater for industrial application requirement. The configuration and controlling can be made using AT-commands. The modem which supports up to 1 OOMbps downlink speed and 50Mbps uplink speed service can utilize the 4G/3G network for convenient and inexpensive data transfer from remote instruments, meters, computers or control systems in packet data.