Check the listing for details. ELAC ProteK 10 Outet Component Surge Protector/Power Conditioner, PICS [PR-91W]. Condition: Used. Listed at 125.89 USD. The antenna and power button is missing (it still works, just the plastic button is missing), see pics6480 Joules of ProtectionPower surges can originate inside and outside the home. When high power devices are turned on or off they can also cause a spike of voltage throughout your homes electrical system. The PR-91W offers up to 6480 Joules of surge protection and reacts to surges in 1 nanosecond.Status LEDsThe status indicators on the PR-91W let you know when your connected equipment is protected, if the AC outlet the PR-91W is connected to is properly grounded, the correct polarity, and if unsafe voltage is coming from the wall.EMI/RFI Noise FilteringCertain high power appliances in your home can all introduce noise into your homes electricity. All outlets of the PR-91W filter your AC power providing up to 70dB of noise reduction your sensitive electronics with clean power.Voltage/Current DisplayVoltage/Current Display The front panel of the PR-91W displays the voltage coming from the AC outlet that the PR-91W is connected to as well as the current draw of your connected devices.Quad USB PortsDelivering up to 2.4 amps for each pair of USB ports, the PR-91W not only protects your sensitive electronics from AC surges but also offers the convenience of USB charging. Simply connect your USB devices to the USB ports on the front or rear of the PR-91W.Over / Under Voltage ProtectionIf the incoming voltage to the PR-91W exceeds 135Vac or drops below 95Vac power to all outlets is turned off until the incoming voltage returns to a normal levelApp ControlSimply connect the PR-91W to your home Wi-Fi network and download our free ELAC Protek app. The Protek app allows for setting a countdown timer, scheduling, and controlling the power on two of the surge protector outlets. You can even control the surge protector from outside the house.Google Assistant and Amazon Alexa CompatibleUse your homes voice assistant to control the PR-91W