Specifications: 1) Voltage: 110V or 220V 2) Material: hemlock, red cedar, spruce 3) Designed for 4 persons 4) Certificate: CE, RoHS, FCC, CETL, ETL Benefits: 1) Detoxify and lose weight 2) Enjoy radiant and youthful skin 3) Find relief from pain 4) Healthy for your heart 5) Reduce unsightly cellulite 6) Wake up your immune system and combat the effects of daily stress 7) Enhance other treatment and exercise 8) Increases blood circulation 9) Ease joint pain and stiffness 10) Remove stress and fatigue Functions: 1) Low operating cost, 2) LED light with brightness adjustable 3) CD player with radio (stereophonic) 4) Floor and ceiling vent for air circulation 5) Tempered glass window(s) 6) Removable high quality infrared heater or board system 7) Digital temperature and time control panel inside 8) Comfortable backrest and bench seating 9) Crown ceiling with outside lights 10) Optional: 7" LCD TV / towel / towel rack / magazine rack / drinking table / oxygen ionizer / color lamp therapy and remote control Features: 1) Low operating cost, use the same amount of energy as your toaster 2) Beautiful and luxurious appearance, more exquisite craft, like a house to avoid rain and wet with raincoat 3) More luxurious and beautiful fitting 4) Comfortable backrest and bench seating 5) Portable, disassembles as easy as it assembles, assembly takes approx. 20 minutes without any tool 6) Hanging infrared heating system 7) Power box is under bench 8) With door seal strip