Detailed product description No more heating problem ( lack of heat ) New features add on with negative ion, aromatherapy, etc.. Speed up sweating effect at short time period Super conductive fir carbon fiber heating element ( walls panel ) Super conductive fir carbon fiber heating element ( foot pad ) Fir ceramic heater with self automatic temperature preset control ( fir radiant heat blower ) Maximum heating temperature of 62 c ~ 65 c, at room temperature range ( above 23 c ~ 28 c ),2 minutes heating temperature reach 59 c or above Maximum heating temperature of 60 c ~ 63 c, at room temperature range from ( 12 c ~ 19 c ),3 minutes heating temperature reach 59 c or above Maximum heating temperature of 55 c ~ 59 c, at room temperature range from ( 2 c ~ 10 c ),5 minutes heating temperature reach 54 c or above Portable far infrared fir negative ion sauna 2 sizes& variable design available in fabric& leather.. Functions include far infrared(fir), negative ion and electronic pulse massager. Super large size:110(h)x80(w)x84(l)cm Regular size:98(h)x68(w)x80(l)cm Portable far infrared sauna with no steam and no thermo of the ordinary sauna, you will still sweat all over your body when you use the fir, even if it is in winter dry heat - detoxifying - energizing - beautifying slimming - a feeling of well-being This unique high quality portable sauna with exclusive beneficial features, finally can be affordable and used in privacy of your home or apartment or any living environment without large spaces&special communications for it. It's design include the most desirable features the expansive and fancy saunas have. With this portable fir sauna you will have even more conveniences and benefits then with a large sauna. This fir sauna heater box applies hi-tech of super conductive and ultra thin heating element. The high heat efficiency helps perspire, activize the build, promote blood circulation, and keep body healthy.15 minutes of sauna bath corresponds to 30 minutes of jogging for exhausing sweat. With its satisfying design, your head and hands can extend out for reading, watching TV, or listening to music.