PERSY® 52/62VDescription Innovative PATENTED stand alone automatic swing shutter opener Ideal stand alone & fully autonomous stand alone swing shutter window opener Work100% autonomously by a 12V battery. No wiring needed! The comfort of opening your swing shutters without having to protrude or manually open the window is now within everyone's reach. In the case of historic buildings or where the expensive cost of an electrical system would discourage many from