The Xperia Z5 Premium presents an ultra high-definition 5.5” 4K display with 3,840 × 2,160 pixels. The on/off button at the side is equipped with finger print sensor technology, whereby the smartphone is unlocked with a single touch. It is available in the colours chrome, gold and black, the on/off button standing out prominently in bright silver. The front and back are of high-gloss metal and glass.