A keyboard cover refers to a protective layer that is placed over a computer's keyboard to safeguard it from dust, dirt, spills, and other potential damages. Full definition
The tablet will also support the use of the company's keyboard cover accessory in addition to pen input. (techtimes.com)
There's 16 GB of onboard storage, a microSD slot, and an optional Bluetooth keyboard cover. (slashgear.com)
Your comment about the type keyboard cover doesn't really make me feel comfortable that it could really serve as a replacement to a good laptop keyboard. (theverge.com)