But they come with their own little USB adapters. Lol. dont trust any computer without bluetooth built-in from default, this is like asking if you want a notebook without wi-fi. Bluettoh mouses have the advantage that they dont use 1 USB port, as bluetooth is a hidden antena within the notebook.
Definition of arkose. : a sandstone characterized by feldspar fragments that is derived from granite or gneiss which has disintegrated rapidly.
Arkose is a kind of sandstone which is rich in the mineral feldspar. It is made mostly of quartz, but also has at least 25% feldspar. It may also consist of fragments (bits) of rock. Arkose usually contains small amounts of calcite cement, which may also contain iron oxide.