Bluetooth Aluminum Keyboard Case for Samsung Galaxy Tab 3 10.1 Ultra-slim space-saving layout; Energy saving sleep mode; Automatic sleep/wake cover Soft touch and tactile feedback; Supports HID profile; Built-in stand to raise the viewing angle Bluetooth 3.0; Operation Distance to 10 meters Standby Time: 90 days; Uninterrupted Working Time: 140 hours Charging Time: 4-5 hours; Lithium Battery Capacity: 350mA