Capacity: 3 person - Overall Dimensions: (WDH): 61″ x 42″ x 75″ Wood: Natural reforested Canadian Hemlock wood construction Low EMF (EMF Under 8MG when sitting 6 to 8 inches from the heating panels) FAR Infrared Carbon heating panels Temperature: operates up to 140F (Ideal between 118 to 135F) Electrical service: 120V/20amp (consult a certified electrician to install 20 amp outlet and 20 amp breaker)