I have turned the word out put from 5 volts up just a tiny amount so you can interface with most small low devices in complete comfort with no outside source for either charge and/or connection currents! The function of this adapter is, mainly, to charge portable and low voltage electronic gadget s as well as to ensure the safe delivery of electricity. Technological features of this adapter include its advanced circuitry, which provides protection against over-voltage, over-current, short-circuit operation This makes it a perfect power source for smart phone, tablet and other USB-powered devices In scenarios from household everyday use to office environments, the 5 volt power adapter always can serve as a dependable and stable source of power.