Specifications: 1) Dimentions:150x150x94x94x78x190cm 2) Voltage: 110V or 220V 3) Material: hemlock or Red cedar 4) Designed for 4-5 persons 5)Carbon heater 6) Certificate: CE, CETL, ETL，FCC,UL,ROHS,SAA Features: 1) double wall tongue and groove construction. Approx. 40 boards are used in the wall Construction to ensure tight fits and reduce heat loss. 2) CD player with Radio (stereophonic),Digital temperature and time control panel. 3) LED light with brightness adjustable 4) Floor and ceiling vent for air circulation,Comfortable backrest and bench seating . 5)Removable high quality infrared heater and board system 6) Crown ceiling with outside lights,and lengthen temper glass door. 7)Portable, disassembles as easy as it assembles, assembly takes approx. 20 minutes without any tool 8)Low operating cost, uses the same amount of energy as your toaster 9) Optional: 7"LCD TV /towel rack/magazine rack/drinking holder/ oxygen ionizer/color lamp therapy & remote contro