Function: Leather case for 10 inch Tablet Notebook with Built-in keyboard Material: Leather + silicone Special design leather case, it will be more convnient to carry Silence design, It will not affect other people's rest Support wireless transmission technology Use the Leather case in a variety of positions Soft, waterproof, space saving design Built-in Lithium battery: 450 mAh which can last for about one week Band: The ISM band of 2402 ~ 2480MHz Operating distance: 10 meters Operating voltage: 3.0 ~ 5.0 V Sleeping current: < 200 UA Charging current: > 100 MA Theory of working time: 25 days Uninterrupted: 90 hours Charging time: 4 ~ 4.5 hours Lithium battery life: 3 years Key life: 500 million Operating temperature: -20 ~ 55 degrees Celsius Storage temperature: -40 ~ 70 degrees Celsius Dimensions: 280 x 190 x 30 mm (L x W x H) Color: Black Approved: CE / FCC |