Royal Saunas 2 Persons Far Infrared Hemlock Saunas w/5 Low EMF Nano Carbon Mica Heaters 5 ultra big Low EMF nano carbon mica heaters. Designed for 1660 watts of heat;Operates up to 158 degrees F.UL Listed components and ETL Approved Double layer Canadian Hemlock T&G timber. No chemicals added.Best Insulation. Built-in sound system including AUX mp3 connection with 2 Premium speakers. Digital control panel with PROGRAM function. Chromo therapy light, interior light, air vents. Electrical service: 120V / 15 Amps, Plug & play.