An example of an asynchronous medium is

An asynchronous medium is the newspaper, which the audience need not use at one fixed moment.

Asynchronous media do not require people to assemble at a set time, since printed and recorded matter can be used whenever.

Radio is synchronous, broadcasting live to listeners at the moment of transmission.

Television likewise delivers its programmes in real time to a gathered audience.

Film shown in a hall is watched together at a scheduled time, making it synchronous.

Print lets each reader receive the message at a time of their own choosing.