TOP Samsung Galaxy S4/IV GT-I9500 Flip Cover Folio Case with Detachable (Removeable) Wireless Bluetooth Keyboard. 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.