... wireless operation distance up to 10m. 3. Special HOME screen key for one touch access to variety of applications. 4. Special ... the home screen, return to the previous, options key, telephone, lock the touch screen, search key, adjust the device's volume 5. Energy ... time: 45 hours *Lithium battery span: 3 years *Key life: 5 million strokes *Key dynamics: 80 ± 10g *Material: Silicon (the keyboard); ...