Product details: DC input: 24V DC input range: 21V-30V No Load Current Draw: 0.8A Efficiency:90% AC output: 120V AC Regulation:3% Frequency: 60Hz Socket:15A USA type Low Voltage Alarm:19.5V-21.5V Low Voltage Shut Down: 19V-20V Over Load: shut off, recover manually Over Voltage Shut Down:31V Over Thermal: Shut Off Output Automatically, Over voltage protection Cooling Ways: Cooling Fan will run when the temperature is over 50 degree Precautions: 1. Please use the standard battery cables we sent, or a full power output may not be guaranteed. And the spare fuses in the package are just used when the original ones are burned by accident. 2. Please do not connect the inverter with the grid power, and a reverse connection of positive and negative is also forbidden. 3. Please do not overload. If your applications are inductive loads, please choose the inverters whose continuous power is 3-7 times higher than the watts of your appliances. If you want to power up a refrigerator, we suggest you use 10 times higher power inverter. 4. Please turn off the load first then turn off the inverter. And as there is a soft start function, please turn on the inverter first then turn on your loads, or the output may not stable at the first seconds. 5. For a red light flashing, it is a kind reminder to note you the input voltage is a bit high, you can regardless of it. If the input is too high, the inverter will shut down automaticly.Please make sure your battery is fully charged before using. 6. The output voltage can be adjusted in a little range.