What does shared amperages mean?

Shared amperage means multiple ports share the amperage available. Example: If multiple devices are charging at once, each device shares the charging power and can get up to 2.1 amps of the available power depending on the amount amperage available and number of devices that can be connected.

What is Safe-Fail?

This feature cuts power to connected equipment when the surge protector can no longer provide protection – keeping your electronics safe.