I have a very clean, lightly used, Tripp Lite Isobar 4-Outlet Ultra Surge Suppressor (Model: ISOBAR4ULTRA). These are extra heavy-duty diagnostic surge protectors featuring isolated filter banks and a rugged metal housing. Key Features: A Separate internal filter bank block interference (RFI/EMI) between your connected electronics. Military Grade Surge Protection Rating: Provides high-grade energy absorption rated at 3,330 Joules!!! Diagnostic LEDs with Built-in indicator lights confirm power status (Protection Present), wiring faults (Fault), and line correctness.

All 4 ports tested good/operational.

These sell for well over $100 new!!

See my other listing for a 6-port surge protector also available.

See my feedback and thanks for looking....