Auto Meter's clean power supply allows the user to precisely set the regulated voltage between 13.0 and 14.8 V to the vehicle. An on-board digital voltmeter allows for quick, at a glance monitoring and easily accessible fuses and field replaceable leads assure you of easy serviceability and long service life. Over-engineered components allow for day in, day out reliability in both the shop or while powering vehicles on the showroom floor. The Auto Meter Clean Power Supply is available in 100, 75 and 55 A configurations, so it can be used to maintain power during reprogramming on vehicles with even the highest amperage requirements.