The K700 weighs 93g (3.3 oz). It is a rectangular unit that is typically held in the palm of the hand, with the buttons operated by the thumb. It has the 'dual-front' design common to most Sony Ericsson mobile phones since the T630, with the back of the mobile phone designed to look like a digital camera. The central joystick button is used for selecting options and navigating menus (as this is essential for phone operation it wears quickly and jams under heavy use), with the "C" button as an 'undo' or 'delete' button, and the arrow-labeled button as a 'return' or 'back' button. The two buttons labeled by black horizontal lines, known as 'hotkeys' or 'soft keys' perform the function of making binary decisions, labelled on the phone's display (e.g.: save/discard). The on/off button is a black button that is located on the top of the phone next to the IrDA port.