FURMAN For high-performance systems demanding superior protection, the PST-8 provides Furman's professional-grade technology to deliver clean, safe power. It features Furman's core protection technologies, including Series Multi-Stage Protection Plus (SMP+) for virtually maintenance-free operation and Linear Filtering Technology (LiFT) to ensure your components receive the purest AC power. The PST-8 safeguards equipment from catastrophic events with Extreme Voltage Shutdown (EVS) for over-voltage conditions above 137V and in-line suppressors for telephone, cable, and satellite connections.