Feature: 1. Supports LTE TDD, LTE FDD, WCDMA, TD SCDMA, cellular network, also supports specific cellular network sub type. 2. Supports RS485 to 2G, 3G and 4G data transmission, and the UART baud rate up to 460800bps. 3. Supports up to 3 channels of TCP and UDP connection, each connection supports 1400 bytes of data buffer. 4. Supports multiple working modes, including network transparent transmission mode, HTTP mode, MQTT, WebSocket, for IOTService tool, remote dynamic modification of module parameters. 5. Supports SMS AT command configuration, registration package, heartbeat package function, supports the combination of ICCID, IMEI, IMSI, software version, and cellular network connection status. 6. Supports NTP, TCP to RTU, for IOTBridge for remote control and configuration, for IOTBridge working hours, serial port, network OTA upgrade firmware. Specification: Item Type: Ethernet Serial Server Material: PC + ABS Model: PG41-GL-H Voltage Input: 100-240VAC Frequency: 50/60HZ. Package List: 1 x Ethernet Serial Server1 x Antenna1 x User Manual