... comfortable typing rather than clumsy tapping. Special HOME screen key for one touch access to variety of applications. Special ... screen, return to the previous, options key, telephone, lock the touch screen, search key, adjust the device's volume Energy-saving ... time: 45 hours Lithium battery span: 3 years Key life: 5 million strokes Key dynamics: 80 ± 10g Material: Silicon (the keyboard); synthetic ...