This Square, 12mm thick surface-mounting hall-button of elevator is the latest product of Optimax. It is the thinnest hall-button of this kind. This delicate box is made of hairline stainless steel, which is high-grade and wear-resistant. The middle part of this product are two large touch-buttons. Glass panel with graceful backlight makes users feel fresh and bright. Unostentatious structure and harmonic configuration reflect this product’s value and designers’ efforts.