What is needed for a device to send a bit to another device?

Describe how one device can send a bit to another device?

There are elements in order for a device to send a bit, first is the transmitter source where anelectronic device needs to send a message to another device; then the secondelement ofcommunication is the receiver source which receives a message and interprets it; a thirdelement would the medium which provides a pathway for the message to be send andreceive, and the message whether voice, data, image, signal or video where each of thesemessages are sent across the medium first by converting then into binary digits, or bits.