Headphones are a pair of small speakers that are held close to the user's ears. They typically have a wire leading to each speaker (although there may only be one); they may also be wireless. Either way, the speakers receive a signal from it's source.
Headphones are a pair of small speakers that are held close to the user's ears. They often have a wire with which the user can connect to a signal source.
Unlike earphones, headphones rest on top of the ear as opposed to resting inside the ear.