TOP for Samsung Galaxy S4 i9500 PU Leather Case with Bluetooth V3.0 Chipset Wireless Keyboard, More fast and stable connecting, Samsung Galaxy SIV Case, Galaxy S4 Case Perfect match to your S4 Standby time: 30 days. Uninterrupted working time: 30 hours Bluetooth V3.0 -- connection is more Fast and Stable Package Included: 1 x Bluetooth Keyboard Case, 1 x USB Cable, 1 x User Manual. Key Life: 5 million strokes. Operating Distance:10meters