Bluetooth earpiece 蓝牙耳机
wireless earpiece 无线耳机
earpiece receiver 耳机接收器
A: Can you hear me through the earpiece?
A：你能通过耳机听到我说话吗？
B: Yes, the earpiece is working perfectly fine.
B：可以，耳机工作得非常好。
1) 耳机或耳塞部件
2) 电话听筒
3) 助听器中的受话器部分
1. 耳机；耳塞；听筒
noun
1. the part of a telephone, headset, or hearing aid that is placed in or against the ear to listen to sound.
Synonym: earphone, receiver