- Brand: SONY - Model Name: WF-1000XM4 - Color: Black Purchased new in April 2022 and used mainly indoors. Occasionally taken outside, so there is a corresponding amount of wear and tear. Missing ear tips other than the size M that are currently attached. No other accessories are included. Both the case and the main unit can be fully charged. The battery on the left side drains slightly faster; with LDAC connection and noise canceling on, the battery level shown in the image is reached after about 3 hours of use. Please consider this item with the understanding that it is a used product.