The Model 808 is an automatic voltage regulator designed to replace more expensive 125 volt regulators up to 7 amps. Its circuitry is encapsulated to protect from vibration and moisture. The power module is replaceable. It can replace the Basler KR7 Series in certain applications - please call FS Tech Service (800 403 3728) for details. This product is intended for installation by professional electricians/generator service technicians.