DISTRIBUTED SOLAR HEATING SYSTEM - RADIANT HEAT DIFFUSING DESIGN -  Heat evenly spreads from all the solar heating modules to provide a whole-room warming experience. Quiet Comfort: Silent and warm environment without a fan, you no longer have to worry about noise or dust being blown across your room. Digital control heat settings temperature adjustment, you can find the optimal heat level. Extremely Safe: Solid state self limiting overheating protection.