Dell Inspiron 11 (3147, Mid 2014) - Manual (Page 21)

Keyboard
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21
On‑Screen Keyboard
On screen keyboard are available on almost all computers and tablets,
however, they generally used in touchscreen devices such as tablets and
all-in-one computers. You can select the keys using a mouse or by touching
the keys on a touchscreen.
Keyboard Connection Types
Keyboards can be connected to your computer with a cable (wired) or using
wireless signals (wireless).
Wired
Wired keyboards are connected to the computer using a cable (generally
USB) and do not require additional power source, such as batteries.
Wireless
Wireless keyboards are may be use Radio Frequency (RF) or Bluetooth (BT)
to connect to your computer. This reduces cable clutter and gives you the
flexibility to use the keyboard from a more comfortable position within a few
meters from the computer. Such keyboards require batteries to operate.
Keyboard that use RF technology usually ship with a receiver that you
must connect to your computer. Bluetooth keyboards can pair with your
computer’s built-in Bluetooth card or an external Bluetooth adapter.