SONY Full Wireless Earphones Black WF-1000XM4, Left Ear Only. Popular model Sony WF-1000XM4 Type: Canal type Connection type: Wireless Features: Bluetooth, Noise Canceling, Hi-Res, Microphone, Waterproof, Splashproof, True Wireless (Left and Right Separate) *This product is for the left ear only. I am selling this because I lost the right earphone shortly after purchasing it. I have hardly used it since I bought it, so the condition is good. Due to being precision equipment and a used item, cancellations and returns are not accepted. I am not familiar with settings and other support, so please understand that I cannot provide assistance.