Sauna Heater Control with Wi-Fi, Digital On/Off, Time,Temp, Glass UKU Wi-Fi Glass sauna controller makes sauna heating convenient and comfortable. With UKU you can heat your sauna on the spot or do it from your phone through HUUM mobile app. UKU comes with several safety and extra features for a pleasant sauna experience. HUUM UKU Glass is designed for use with sauna heaters up to 9kW (For HUUM sauna heaters over 11kw and up to 18kW, an UKU Ext Box is required.) Elegant Black Glass control display panel Display panel can be recessed or surface-mounted For heaters up to11kW (over 11kW up to 18kW requires an UKU extension box) Settable on/off, time, temperature, and delay Settable temperature range of 122-230F Delayed start-up to 48hrs in advance Built-in Wi-Fi interface for HUUM mobile app 8 Language options: English, German, Russian, Italian, Finnish, Polish, and French Notification when set temperature is reached Inside/outside sauna room installation Displays set temperature and room temperature Door sensor to keep the heat inside the room Remotely located main control module Connects to lights and ventilation or steamer (not included) Glass control display panel, 3.5" x 5.11" x 0.72" (0.54" can be recessed into the wall) Main control module, 5.59" x 3.54" x 2.28" Control display panel cable, 9.84', 12AWG Temperature sensor cable, 16.4', 14AWG Door sensor cable, 16.4', 14AWG Installation and operation manual