About WZRELB Professional manufacturer for pure sine wave power inverter for 10 years provide prompt reply friendly customer service and 18-month Product details DC input 12V DC input range 10V-15V Efficiency 85%-90% AC output 120v Frequency 60Hz Socket Dual US type Low Voltage Alarm 9 5V-10 5V Low Voltage Shut Down 9V-10V Over Load shut off recover manually Over Voltage Shut Down 15 5V Cooling Ways Cooling Fan will run when the temp is over 50 degree Celsius Precautions 1 Please do not connect the inverter with the grid power and a reverse connection of positive and negative is also forbidden 2 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 3 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 4 For a red light flashing it remind that the input voltage is a bit high 5 Please use the set of standard battery cables we sent or a full output may not be There are build-in fuse for safety concern the fuse come with package are just spare parts 6 Considering transportation safety we took off the battery of remote controller you can buy it in your local place Its specification is 23a 12v