Brand N/A Quantity 1 Piece Color Black Material Plastic + aluminum alloy Compatible Models Samsung Galaxy S4 i9500 Wired/Wireless Wireless Keys 51 Connection Bluetooth V3.0 + HS Operating Range 10 m Battery 280 mAh Charging Time 2 hour Working Time 8 hours Standby Time 45 days Features Built-in Li-ion battery working voltage: 3.7V Other Charging voltage: 110~240V; Case and keyboard can separate using; Slide-out and adjustable standing; Backlight to type in dark places Packing List 1 x Bluetooth keyboard case with stand 1 x USB cable (75.7cm) 1 x English user manual