Features: R250 AVR is specially designed for optical machines with excitation, which can control the current to maintain the output voltage. It have excellent voltage regulation performances, easy setting and reliable use. Analog AVR with digital control: AVR R250 generator combines analog and digital control functions, and uses microcontroller and transistor to control power to achieve accurate control. AVR R250 is composed of electronic component, which is durablity in designs and can work under various conditions. Its rating fault current is 5A, and its maximumly fault current is 7A. AVR of R250 generator can be easily realized by AVR, including potentiometer for voltage and stability setting, frequency selection option and remote voltage setting option. Perfect for industrial enterprises relying on generator power, outdoor event organizers needing portable power stability, and construction sites requiring dependabled energy supply for tool. Specifications: Component:Plastic Size:Approx.13x6.5cm/5.12x2.56inch Color:Black Model: R250 Power input: voltage 120(90-140)VAC, single-phase 2 wires. Frequency: 50/60HZ Sensing input: voltage 415VAC. Output: 90V, 6A, 10A in 10 consecutive seconds. Voltage regulation rate: 0.5% Working environment temperature: -20℃~70℃ 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.