Operated by front-panel knob, Model 8100 has all-aluminum enclosure that provides durable shielding. It requires no external power and has operating temperature range of 1.4-167°F. Data switch with self-wiping contacts has DB9 female connectors on A and COM rear-panel ports, and one DB9 female connector on B front-panel port. Rubber feet prevent sliding. Mounting ears adapt product to panel.