Universal Wireless bluetooth Keyboard for Laptops & Tablets, Compatible with IOS, Android, andWin8 Systems with backlighting

Universal Wireless Keyboard for Laptops & Tablets, Compatible with IOS, Android,  andWin8 Systems Product features: F3S ( with backlighting ) F3 ( without backlighting ) 1.0 Built-in slimmest wireless Bluetooth 3.0 keyboard 2.0 Automatic connecting (without entering password) 3.0 Supports 7-color backlight, can freely adjust brightness 4.0 Built-in rechargeable lithium battery lasts for approximately 100 hours per charge 5.0 Lightweight, quiet keystrokes, waterproof and dust-proof 6.0 Energy saving keyboard sleep mode     Specifications: Bluetooth 3.0 interface standard Operating distance to 10 meters Modulation system: GFSK Operating voltage: 3.7-4.2V Working current: 2.5-3.5mA Sleeping current: <0.2mA Standby time: 60 days Charging time: 4-5 hours Uninterrupted working time: 55-70 hours Lithium battery capacity: 400mah ( with backlighting ) 150mah ( without backlighting ) Lithium battery lifespan: 3 years Key strength: 80 ±10g Key lifespan: 5 million strokes Operating temperature: -10 -55℃ Package contents: Wireless Bluetooth keyboard x 1 User's guide x 1 USB charging cable x 1 Packaging box