Mention the word wireless, and the first thing that comes to mind is Bluetooth or Wifi. Wireless audio utilizes radio-frequencies to transmit audio signals to from one point to another. Bluetooth and Wifi transmit both data and non-data signals, which make the two among the most commonly used forms of wireless transmission.

Radio waves travel through the air, using a conduit to get from Point A to Point B. Bluetooth uses a transmitter, while Wifi uses a router.
Just like your mobile phone, wireless audio sends wave vibrations from one device to another. The main difference is the transmission distance. Your mobile phone can transmit to anywhere in the world, while wireless audio has a limited distance.

You can use wireless audio in places like your room, your office, your house, coffee shops, or any area within a short transmission range.
Wireless audio output is in digital code format, which helps remove sound distortion and noise. Although you can transmit sound directly to a speaker using wireless audio, you still need to add amplifiers to magnify the sound.

Whichever form of wireless audio you choose, the most important thing you need to consider is compatibility to your device and that it caters to your specific need.