The Zula System is a combination of a Solar panel and a 3 powerful fan box.
It is designed with 2 fans blowing air into the room and 1 fan facing out side to blow the old air out of the room / Building. 
 
When ordering the Zula system, you will receive 3 items in the box.
1 Solar Panel - All black 30W solar panel (21.25" x 15")
1 Zula Unit - ABS plastic housing with build-In fans (21" x 14.5" x 1.75" depth)
1 on/off switch