Hi, I'm interested in your product, the details I need:
I would like to ask you about a few questions.
One. indication can be English? (For example, on, off)
Two. is this product can be OEM?
Three. Is it possible to change from the operating frequency 60 Hz ~ 50 Hz to 40 Hz ~ 50Hz?
Four. do you have Japanese instructions?
I would like to get sample of this item.
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