I purchased this about two years ago and used it about once a month. I'm selling it because I've started using a car for most of my travel and no longer use it. The battery may have deteriorated, but I haven't experienced any inconvenience while using it. Please be aware that this is a used item before purchasing. - Brand: SONY - Color: Black - Charging Port: USB-C - Design: In-ear - Missing items: USB-C cable, ear tips (size M) Other features: Noise canceling