All Internorm window systems with integrated blinds can be installed with I-tec Shading. This sun protection uses a photovoltaic module and batteries, therefore, no external power source is needed. The photovoltaic system is placed in between the glass panes for maintenance-free sun and privacy protection. The intelligent automatic mode operates blinds with day-and-night recognition. Your choice of blinds, Venetian blinds, or Duette® in each room can be programmed according to the amount of sunlight transmitted throughout the day to avoid excess heat.