InstallerParts 500mA Universal AC/DC Adapter - Adjustable DC 3/4.5/6 / 7.5/9 / 12V Output 500mA Universal AC / DC Adapter Input: AC 110 / 220, 50/60Hz Adjustable Output: 3, 4.5, 6, 7.5. 9, 12V DC 500mA 6 Common Tip Sizes Polarity switch