The Kiruna™ 1 fits 1 bather in a clear-hemlock cabin with a tempered full-glass front. There is no rock heater, heat comes entirely from CarbonFlex® infrared panels. The Aspire™ Control Panel, Tylo Sauna App, Bluetooth® integrated sound, and chromotherapy multi-color LED lighting (internal and external) are standard. The cabin plugs into any standard 120V / 15 Amp household outlet, no electrician required for the heater.