WZRELB 1500W 12V DC to 120V AC pure sine wave inverter generator, as good as Grid power, 1500W continuous power, with LED displays for DC AC voltages. Dual us outlets.During use, due to the influence of the load, the output voltage may be too high or too low. Please kindly know that the output voltage can be reset in a certain range at your end. If necessary, please contact us for adjustment. Fully safety protections: over voltage, low voltage, overload, short circuit, over heat, polarity reverse protection(fuse), ground protection from leakage of electricity. Build-in intelligent cooling fan works according to temp and not load. Prolongs battery life. It is fairly quiet and only cycles on when the temp is over 50 degree Celsius. Monitor power usage with no effort -- LED Display for both DC volt and AC volt which makes the power usage clear for users. High quality pure copper inductance, filter the wave form, ensure the true pure sine wave AC output, safeguard your equipment. All big imported mosfets with strong driving capacity. During use, due to the influence of the load, the output voltage may be too high or too low.Pls kindly known that the output voltage can be reset in a certain range at your end. Refer to the PDF attached below in Product guides and documents for manual