Flush-Mounted Sauna Controller with Negative LCD Sauna Thermostat for Sauna Room Control Board. Seamless Flush-Mounted Design: Engineered for recessed installation outside your sauna room. The ultra-thin negative LCD panel sits perfectly flush against the wall, acting as a minimalist smart-home. Crystal Clear Negative LCD: Features a premium black background with highly visible, high-contrast digits. Read the temperature and status clearly even from down the dim hallway. Pre-heat via Smart App: Start your sauna from your smartphone before you even arrive home, ensuring it is perfectly heated the moment you step in. Real-Time Status Outside the Door: Check the precise temperature and remaining countdown right outside the sauna. Stay informed and manage relaxation schedules effortlessly. Fits Standard 86x86mm Backbox: Designed for hassle-free installation by electricians. Fits perfectly into standard EU/UK Type 86 wall boxes with concealed wiring for a clean finish. (Cutout dimensions.