VARIABLE VOLTAGE: This power supply features adjustable, and allows for use for most electronics within DC 3V to DC 24V output voltage, simply adjust the voltage knob and choose the right volt via the voltage display to use MULTI ADAPTERS: This power adapter replaces a lot of power adapters, comes with 14pcs 5.5*2.1 mm end adapter tips to enhance the compatibility and practicality, you can use this power adapter for different devices FULL 3A LOAD: Compared to fake 3A power supply on market that the voltage may drop while use, this power adapter supplies stable output voltage and improves the charging efficiency, offers multi protections, prevents the possible damage and ensures safe charging WIDE APPLICATIONS: This AC100-240V to 3v-24v dc power supply is compatible with most small household electronics, such as LED strip lights, security camera system, humidifier, printer, LCD/LED monitor, router, audio device, modules, light bards, puck, accent lights, table lamp, speaker, DVD