Features: Compatible with most tablets, suitable for 7~7.9 inch tablets. Widely suitable for Android/Windows systems. Ultra-thin design, which is very convenient for you to carry it to travel. Comes with a touchpad, which gives more convenience and makes operation easier. Scissors feet design makes keys return rapidly. Gives a fast and comfortable typing. It can be used with smart phones, tablets, laptops and desktop computers. Super long service life up to 5 million clicks. Large capacity battery enables this Bluetooth keyboard to work for continuous 40 hours and stand by for 60 days. Specification: Product Type: Bluetooth Touchpad Keyboard Material: ABS, Aluminium Alloy Color: Black Size: Approx. 20 * 12.7 * 5cm Bluetooth distance: 10m Working System: for Android/Windows systems Operating voltage: 3.0-5.0V Working current: <2.0mA Standby current: 0.3-0.5mA Sleeping current: <25UA Charging current: 100mA Charging time: 4 hours Lithium battery capacity: 120ma Lithium battery life: 3 years Charging mode: micro USB charging Work time: 40 hours Standby time: 60 day Keyboard service life: 5 million clicks Working temperature: -10~55? Package Weight: Approx. 139g/4.9oz Package List: 1 * Keyboard 1 * User Manual Note: Please allow 0-1 inch error due to manual measurement, thanks for your understanding.