Raritan DSXB-4-M. Management protocols: HTTP/HTTPS, SNMP. Authentication method: RADIUS, TACACS+, LDAP(S), Kerberos, Security algorithms supported: SSH, SSL/TLS, 802.1x RADIUS, HTTPS. Dimensions (WxDxH): 290 x 270 x 44 mm, Weight: 2080 g. AC input voltage: 100 - 240 V. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 20 - 85 %