A variable voltage regulator to fine tune voltage output in case your vehicle application is not pulling a proper voltage to regulate LED products. With some vehicles there will be an overload of voltage causing our Halo's to quickly burn out from running different voltage's instead of a constant 12v source. Product Specs: 12-36V Wide Range Input Protects 12V LEDs by providing optimal input current. Extend the lifetime of all 12V DC LED Lighting Products. Maximum Output Current 2 Amps / 24 Watts. Waterproof alloy housing makes the converter ideal for use in a wide range of automotive applications. Built-in over-voltage under-voltage overload over-heat and short circuit protection Small size (2.5 x 0.75 x 1.25) for easy mounting and installation. High quality and high performance. 1 Year Warranty.