An earpiece often refers to tech gadgets for audio, like in phones or computers. I just bought a wireless earpiece to make calls.
Pro Tip 2/3
Common Misuse
People may call any headphone 'earpiece', but true earpieces are usually smaller and for one ear. The Bluetooth earpiece is easier to carry than my big headphones.
Pro Tip 3/3
Wireless Trend
Earpieces are increasingly wireless and Bluetooth-enabled for convenience. She prefers a Bluetooth earpiece to avoid tangled wires.