Immersion Pipe Heater DAIEI with Temperature Control Function 100V 1KW Water Heater Purchased on Amazon three years ago and used a few times, but has been stored cleanly since then. Power-on confirmation has been done. I'm not sure if the operation is perfect (I think it's probably okay because there were no problems when I used it). It's sold on Amazon for 12,980 yen. I apologize, but there is no instruction manual. Please check Amazon or other sources for details. The earth wire was short, so I extended it myself after purchase. I will send it as is. It worked normally. Feel free to ask any questions.