Usually snowmobiles without a battery, power accessories using AC current. The regulator on these machines sometimes allow voltage spikes up to 30+ volts. Our AC/DC Voltage Converter converts this AC current into a manageable DC current needed to power up our gauges. This allows our gauge to be used in other applications other than snowmobiles such as tow vehicles, etc. Designed for Snowmobiles without a Battery. Robust Electronics for powering DC Gauges. Beautifully machined Housing & End Caps. Lightweight & Powerful. Easy to Install. Epoxy filled.