... Play, no software or driver required.• Built-in rechargeable lithium battery lasts for approximately 45 hours ... Special key features for iPad, such as search, screen brightness, photos, music playback, volume, Home key, lock ... Operation distance: Up to 10m- Lithium battery span: 2 years- Key life: 5 million strokes- Key dynamics: ... weight: 520g* Total weight: 726g 2 in 1 Bluetooth Silicon Keyboard & Case