Wireless earbuds with high-performance noise-canceling. - Brand: SONY - Model: WF-1000XM4 - Voltage: 5V - Model Number: YT2340 I purchased these used here in February of this year. I've only used them about 5 times since I bought them, and I haven't used the battery until it was completely drained, so I'm not sure how long it lasts. There is a scratch on the right side (R). Thank you for looking.