Final answer:
A green listening and transmitting device that fits inside the ear is commonly known as a Bluetooth earpiece or Bluetooth headset. This device uses wireless Bluetooth technology to connect to a phone or other audio device and allows the user to listen to audio and make phone calls without holding a phone to their ear.
Step-by-step explanation:
A green listening and transmitting device that fits inside the ear is commonly known as a Bluetooth earpiece or Bluetooth headset. This device uses wireless Bluetooth technology to connect to a phone or other audio device and allows the user to listen to audio and make phone calls without holding a phone to their ear. It is a convenient and portable solution for hands-free communication.