Power Sentry 6-Outlet Plus Coaxial Wall Surge Protector for $14.99 shipped. Here is a screenshot for your reference. It features 40dB EMI/RFI noise filtration.
Power Sentry
Philips Power Sentry 5-Outlet PowerSquid in White for $8.99 Shipped
Philips Power Sentry 5-Outlet PowerSquid in white for $8.99 shipped. Most places usually sell it for $18.99 or more.