SoulBay 12W Universal 3V 4.5V 5V 6V 7.5V 9V 12V AC DC Adapter Switching Power Supply with 8 Selectable Adapter Plugs for Household Electronics Routers Speaker CCTV IP Cameras – 1000mA Max

This AC/DC adapter can apply to most appliances, which the efficient voltage is from 3V to 12V.
This adapter output is 3V/4.5V/5V/6V/7.5V/9V/12V. You’ll easily set the voltage by a little key, which is included with the adapter.
Equipped with 8 adapter plugs, the different size will fit for your appliances well, and solve your more than a few problems.
With protected and a couple of function, it is easy to operate, and the adapter could be very durable, it is safe to make use of.
This 8 adapters in1, which can in large part save your space and the one can replace so much adapters. Attention: DC Plug Polarity: inner Positive(+), outer Negative(-), Polarity is irreversible.