adjective / noun
handheld
HAND-held/hˈændhˈɛld/
A device small enough to be held and used in one hand.
The compact handheld flashlight fits in one hand.

Etymology
Hand and hold describe support supplied by the user's grip. Originally applied to cameras used without a stand, handheld now describes things small enough to hold and use in one hand.
In context
there are these handguns that I mentioned before right that are well they're hand mounted they're handheld and they have a small x-ray tube in them pointed outwards
More examples
- The handheld fits easily into his coat pocket.
- We use a handheld recorder during the interview.
- The new handheld has a brighter screen.
Forms
handheld · handhelds
Similar words
- portable
- Easy to carry, but not necessarily usable in one hand.
- mobile device
- A mobile device can be carried and used away from a fixed location; a handheld fits in the hand.