SoulBay 30W Reverse Polarity Universal Power Adapter with 9pcs Adaptor Tips 3V to 12V AC/DC Multi Voltage Supply for Household Electronics, 2Amp Output

Reverse Polarity Power Adaptor: Most adapters only have single polarity, positive (+) or negative (-) polarity. This SoulBay AC Adapter owns Dual Polarity, reversible and changeable. Versatile Power Supply: Straightforward adjustment for All-in-one multi adapters and multi amp devices, solid and well built. Voltage range, connector jacks and polarity are Selectable. Wide Applications: The power supply is for router, speaker, monitor, camera, smartphone, led strip, piano, keyboard, effect pedal board, and a variety of household electronics require 3 volt, 4.5 volt, 5 volt, 6 volt, 7.5 volt, 9 volt, 12 volt DC output with 2000ma load. Save On Adapters: Own this AC DC adapter, you could use it for multiple devices and replace a lot old power adapters, savings on buying a new electronic device or extra original expensive power supply. Package: You will get a 1 x 3-12V universal adapter, 9 x changeable adapter tips, 1 x key. Each adapter tip has the clear dimension mark, no mess and convenient for you!