Surge protectors with USB-A
prices on 186 modelsUSBAA
— the filter includes one or more USB-A ports for charging and powering various gadgets, primarily smartphones and tablets. The exact number of such ports may vary, with some models having up to 6. In any case, a filter or extension cord with USB is especially convenient when there is no "220-to-USB" adapter at hand, and there are few USB ports on a computer or laptop, making their use for charging a "luxury."