(METRO) kotatsu Replacement heater U-shaped quartz tube MSU-501H (K)

I made a make-shift kotasu with this and I love it. I feel that the heaters metal grate was mailable so that was worrying but not a concern because I never touch it again after setting it up. It’s not hot to the touch even when it’s going full blast so family friendly! And not harmful at all!It did smell at first because 1. I didn’t use it with a cover since I was testing it and 2. It hasn’t been used for a while. The smell went away quicklyTook some experimenting because I don’t know Japanese but the controls were easy to learn. The knob is the level of heat you want, while the switch is it’s on and off. Simple right?