The ellipsometer is very good. It doesn't need to be plugged in. The floor area is also suitable. The sound is a little loud, but it is about silent after being coated with the oil given by the seller. It's amazing. The personal trainer in the gym recommended using the ellipsometer. It doesn't hurt my knee so much. I hope I can stick to it.

The machine is good. It can be folded without any sound. I hope to lose weight quickly!

The heavy ones are very loud to use. I don't know if it's a problem with the installation. Everything else is fine