Check the listing for details. ELAC ProteK 8 Outet Component Surge Protector/Power Conditioner w/ Dual USB. Color: Black, Condition: Used. Listed at 69.89 USD. 2160 Joules of ProtectionThe PR-71S absorbs dangerous spikes to help protect your equipment. The PR-71S can handle a spike current of up to 144,000 Amps and up to 6,000 VoltsStatus LEDsThe status indicators on the PR-71S let you know when your connected equipment is protected, if the AC outlet the PR-71S is connected to is properly grounded, the correct polarity, and if unsafe voltage is coming from the wall.EMI/RFI Noise FilteringReduces unwanted noise from your AC outlet providing clean AC powerVoltage DisplayThe front panel of the PR-71S displays the voltage coming from the AC outlet that the PR-71S is connected to.Dual USB PortsProvides up to 2.4 Amps of charging power for your USB devicesOver / Under Voltage ProtectionIf the incoming voltage to the PR-71S exceeds 135Vac or drops below 95Vac power to all outlets is turned off until the incoming voltage returns to a normal level