Features: The automatic voltage regulator ensures precise voltage regulation for generators, providing stable power output and reducing the risk of equipment damage, making it a essential accessory for reliable generator performances. Featuring advanced electronic control technology, this regulator offer high voltage stability, overvoltage protection, and adjustable voltage range, designed specifically for single phase generators operating. For generator users such as individuals or businesses requiring stable power supply, construction teams relying on generators for site equipment, and electrical maintenance technicians needing to understand regulator performances. Perfect for use in diverses scenarios like construction sites ensuring smooth operation of equipment, outdoor activities providing reliable power for lighting and appliances, and emergency backup during power outages for homes or businesses. It is easy to install and maintain, offering enhances efficiency and longevity for various generator applications. Specifications: Component: Plastic Size:Approx.12.5x9.5cm/4.92x3.74inch Soft start voltage ramping. Sensing voltage loss protections. 120 or 240 Vac sensing, jumper selectable. With under frequency LED indicator. Model: AS440 input Voltage: 120(90-132)/240(190-264)VAC Frequency: 50/60Hz Number of phases: single phase output Voltage: maximumly. 90VDC at 207VAC input. Current: continuous for 4A, intermittent for 6a at most (10 seconds). environment Working temperature:-20 ~+70°C maximumly humidity: 95% maximumly Storage temperature:-30 ~+80°C Package Includes: 1pcs Automatic Voltage Regulator note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.