TOP 2013 New Arrival Removeable (Detachable) Wireless Bluetooth Keyboard Cover Case for Galaxy S4, SIV, GT-I9500. 6~10 Days Delivery Superb tactile Keyboard get your typing and texting extremly easy! Famous Brand Broadcom Bluetooth V3.0 interface Standard. Operating Distance:10meters Key Life: 5 million strokes Elegant slim and strong protection, display stander for easy viewing Standby time: 30 days. Uninterrupted working time: 30 hours.