Lantronix XPress-DR+ Wireless. Management protocols: SNMP, Telnet. Supported network protocols: ARP, UDP/IP, TCP/IP, Telnet, ICMP, SNMP, DHCP, BOOTP, TFTP, HTTP, ModBus TCP, ModBus ASCII/RTU. LED indicators: LAN, WLAN. Dimensions (WxDxH): 57 x 876 x 285.7 mm, Weight: 210 g. Operating temperature range (T-T): -40 - 70 °C, Operating relative humidity range: 20 - 90 %