portable cellular telephone

Small telephone that transmits voice or text messages via radio waves.

scroll wheel

Button used mainly to navigate through telephone menus and directories.

end key

Button used to disconnect a telephone link.

antenna

Device that emits and receives radio waves.

power button

Power switch used to turn the cellular telephone on or off.

receiver

Small voice reproduction speaker that is placed over the ear.

display

Liquid crystal display that shows various information such as phone settings, text messages, dialed numbers and a caller’s name and number.

selection key

Button that selects a setting or operation to be carried out.

talk key

Button used to make or answer a call.

alphanumeric keypad

Keys corresponding to letters, numbers and symbols that are used to dial a number, compose a message or access functions.

sliding cover

Movable part that covers the keypad when not in use.

microphone

Device that converts electric pulses into broadcast or recorded sounds.