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Surge suppressors, or protectors are designed to prevent occasional power surges or spikes from damaging sensitive electronics. They plug into the wall and have multiple outlets so you can connect your other equipment. When power is interrupted and then snaps back on, they shut down to protect sensitive transistors and microprocessors. Not all suppressors are created equal and their blocking ability is rated in joules(jewels). Choose one rated at 1900 joules or higher. “Clamping voltage” is the point at which it shuts down – and lower is better. Good ones are 330 or less. Suppressors do wear out and the better ones have alarms to let you know they’re failing. Before you buy, read the box and ask questions to ensure you get the protection you want and need.