ASUS ZenFone 2(ZE550ML) has a stunning, all-new design employing iconic ASUS design elements that echo the spirit of Zen, with our signature concentric-circle detailing. The graceful Ergonomic Arc case tapers to an incredibly-thin 3.9 mm at the edges for a bold yet elegant look, and the rear-mounted volume-control and shutter button is ideally positioned for your index finger. The vivid 5.5-inch HD IPS display packs an incredible 267ppi pixel density bordered by an ultra-narrow bezel, giving ZenFone 2 a remarkable 72% screen-to-body ratio for a maximized viewing experience — everything you see is bigger, brighter and more beautiful.