Output Frequency: 110V defaut 60HZ, 220V defaut 50hz. Leave us a note if you need difference. Output Waveform: Pure Sine Wave. Waveform Distortion: <3%(Linear Load).Place of Origin: Zhejiang, China(Mainland). The item "4000W DC24V to AC110V Pure Sine Wave Solar Power Inverter Off Grid LED Display" is in sale since Tuesday, October 4, 2016. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Electronics Accessories\Power Inverters". The seller is "makerele" and is located in yueqing, . This item can be shipped worldwide.