Feature: 1. Comfortable buttons, easy work, save time, convenient for office and study 2. The appearance is simple and vivid, full of fashion , and comfortable for writing 3. Multi‑function full‑key keyboard responds quickly without delay, and there is no need to worry about time issues 4. Portable and ultra-thin, it is very convenient for you to carry it on trips or business trips 5. Can be used with smart phones, tablets, laptops, and desktop computers,etc How to Use: Plug and play Specification: Item Type: Keyboard Material: Aluminum Alloy + ABS Color: Silver Battery: Lithium Battery Battery Capacity: 11400mAh (built-in) Applicable Models: For Microsoft Book Base 1704/1705/1785 Package List: 1 x Keyboard Comfortable buttons, easy work, save time, convenient for office and study The appearance is simple and vivid, full of fashion , and comfortable for writing Multi‑function full‑key keyboard responds quickly without delay, and there is no need to worry about time issues Portable and ultra-thin, it is very convenient for you to carry it on trips or business trips Can be used with smart phones, tablets, laptops, and desktop computers,etc ASIN B09XRDMNHF Item Weight 2.62 pounds Manufacturer Diyeeni Item model number DY01 Package Dimensions 14.45 x 12.09 x 2.48 inches