Final answer:
Air-Fi boxes work at a frequency range of 2.4 GHz to 5 GHz and can transmit audio wirelessly within a range of about 30 to 100 feet.
Step-by-step explanation:
The Air-Fi boxes, also known as Air-Fi transmitters, work at a frequency range of 2.4 GHz to 5 GHz.
These boxes are used for wireless audio streaming and communication, allowing users to connect their devices like headphones or speakers without the need for physical cables.
The range of Air-Fi boxes depends on various factors such as obstacles, interference, and the transmitter power, but typically they can work within a range of about 30 feet to 100 feet.