This is well built, I have neuropathy in my feet at night and have had it for 20 years. I use the red light therapy twice a day for twenty minutes I set the light 12 inches from my feet. For the first time in such a long time, I have no pain. This model was worth every penny.

Really work for me !?

Love love TDP's. I have 2. I have bought for several others, who also love it.I also use at my chiropractors office.

is 110v or 220volt

Although there is no light of any sort. This lamp actually relieved my back spasms and pain.