Feature: 1. Excellent Insulation: The regulators are well insulated to maintain high reliability in harsh environmental conditions and high vibration levels. 2. Applicable Model: This automatic voltage stabilizer is suitable for Marelli generators, and its steady state voltage regulation rate is 0.5%, which is very practical. 3. Voltage Build Up: When the remanence is greater than 4V 25Hz, the voltage regulator board will automatically build up the voltage. 4. ABS Housing: ABS has good wear resistance and is not easy to scratch and wear, which ensures the service life of the voltage stabilizer. 5. Common Accessories: This voltage regulator board is one of the common accessories for generators, it can regulate the voltage quickly and stably. Specification: Item Type: Automatic Voltage Regulator Material: ABS Model: M40FA640A Voltage Build Up: When the remanence is greater than 4V 25Hz, the voltage will be built automatically Input Power: Voltage 150-278V 50, 60Hz Induction Detection: AC170-270V, 380-415V, 440-480V single phase or 3 phase, 50, 60Hz Steady State Pressure Regulation Rate: ±0.5% (within 4% engine speed variation range) Working Temperature: -30℃-70℃ Application: Suitable for Marelli generators. Package List: 1 x Automatic Voltage Regulator1 x Instruction