High efficiency of pure sine wave Pure sine wave inverters have a cleaner signal compared to modified sine wave inverters that have a "blocky" signal. It provides a more stable sine wave output and can be used on curling irons, hair straighteners, microwave ovens, etc. Household appliances that probably cannot be operated with the modified wave inverter. remote control Inverter with remote control: cable length 16.4 feet, the long cable helps you turn the inverter on and off easily. Why can't the inverter power the load below 1000W? 1. The batteries are too small capacity, please replace them with a larger or more batteries. 2. The voltage of the batteries is too low. Please charge it fully and then try again. 3. The connection cables between battery and inverter are too thin. Try to use a thicker cable. 4. The connection cables between battery and inverter are too long. Try using a shorter cable. 5. Since sensitive devices may be in the load, the starting power may need to be increased by 3 to 8 times depending on the situation.