This enclosure is conveniently and easily installed, designed and operated with a thin and complete all-in-one solution. It features ingression protection, anti-reflection technology, vandalism protection and a highly efficient cooling system, all of which are assembled mechanically and perfectly. The system improves outdoor signage design by eliminating the need for additional air conditioning systems and thick enclosures. It requires no additional parts, so it is extremely simple and thin outdoor signage enclosure.