A Bosch cordless drill is a battery-powered drill/driver (or sometimes “hammer drill/driver”) intended for drilling holes and driving screws into materials like wood, metal, and — in some variants — masonry.
Because it is cordless, it runs off a rechargeable lithium-ion battery rather than needing to be plugged into mains power.
This design gives you portability and freedom of movement — useful for work sites, home projects, or places without convenient power outlets.