HUUM UKU Glass Wi-Fi Electric Sauna Heater Control UnitHeat your sauna from your phone UKU Glass Wi Fi sauna controller makes sauna heating easy and comfortable. With UKU you can heat your sauna on the spot or do it from your phone through HUUM mobile app. HUUM mobile app works with UKU Wi Fi and UKU GSM control units. UKU comes with several safety and extra features for a pleasant sauna experience. It can be used with different manufacturers heaters. for heaters up to 18 kW connectable to lights