9 Dynamic Low EMF FAR Infrared Carbon heating panels 3 on the rear wall 2 on each side wall 1 under the bench and 1 on the floor board Full 3 person capacity Natural Reforested Canadian Hemlock wood construction 6mm Interior and Exterior wood planks with a 1.13 inch inner frame Bronze Privacy Tempered glass door and with side windows Exterior Accent Lighting / Interior Chromotherapy Color Lighting System Interior & exterior LED control panel / Built in Bluetooth - MP3 auxiliary Connection and 2 speakers Electrical Service: Special Electical 110 V/20 AMP dedicated receptacle and breaker (Not 220/240 V) (Please consult a certified electrician.) Indoor Use Only.