Furman Sound PL-PRO DMC Power Conditioner with Voltmeter/Ameter brings together superior protection and outstanding performance in a sturdy, rack-mountable design. The Classic Series features Furman’s revolutionary Series Multi-Stage Protection (SMP), Linear Filtering Technology (LiFT), and Extreme Voltage Shutdown (EVS). Together, these technologies comprise what is, without question, one of the world's most advanced and comprehensive transient voltage surge suppressors. The large digital voltmeter / ammeter, with discrete dimmer button, displays line voltage and true RMS current draw. Plus the advanced EVS circuitry detects dangerous voltage irregularities and safely powers down itself and connected equipment in unsafe conditions.