Mountain Ridge ESF402HCB Infrared Heat Sauna 4 person hemlock carbon heater Model ESF402HCB 4 back rests, upholder, towel hook and magazine rack, built in sound system includes AM?FM radio, CD player and MP3 plug 110 volt/20 amp power, air vents allow fresh air in, therapy light and oxygen ionizer 4 person hemlock carbon heater Model ESF402HCB 4 back rests, upholder, towel hook and magazine rack, built in sound system includes AM?FM radio, CD player and MP3 plug 110 volt/20 amp power, air vents allow fresh air in, therapy light and oxygen ionizer 4 person hemlock carbon heater Model ESF402CB 4 back rests, upholder, towel hook &magazine rack, built in sound system includes AM?FM radio, CD player and MP3 plug