Adjustable 3-12V Voltage Adaptor Charger USB AC/DC Power Supply Adapte Universal

This adapter output is 3V/4.5V/5V/6V/7.5V/9V/12V. 7 Different Adapter Output With KEY: 3V/4.5V/5V/6V/7.5V/9V/12V. 1 x 30W Universal Power Adapter. Adapter Input: AC 100V~240V 50/60Hz. Output DC Plug: 5.5 2.5mm, 4.0 1.7 mm, 5.5 2.1 mm, 2.5 0.7 mm, 3.0 1.1mm, 3.5 1.35mm, LED Connector, Micro USB.

eBay