Built with IP40 aluminum casing, a -40 ℉ to 167 ℉ operating temperature range, and 6kV lightning protection, these fanless switches withstand installations where heat, electrical interference, and continuous uptime are non-negotiable. *Power adapter is not included. Omada industrial switches provide reliable gigabit connectivity in environments where standard networking equipment can't operate. Connected to an external alarm, the switch outputs an alarm signal promptly if a port is disconnected or power input is abnormal. TP-LINK TL-SF1008 Industrial-grade 8-port network switch Ethernet wall-mounted/rail-mounted installation Wide voltage 12V/24V/48V redundant power supply Anti-interference VLAN isolation dust-proof.