Used a few times, but selling because I want to buy something else. Works without any problems. With noise-canceling and up to 70 hours of battery life, it provides a comfortable listening experience for everyday use, travel, and commuting. 【Long-lasting Use OK】 Up to 70 hours of playback is possible. Less need for charging, making it safe for use on the go or for long periods. ■Product Information Brand: JBL Model Name: TUNE 770NC Color: Black Bluetooth: Supported Noise Canceling: Yes (ANC) Battery: Up to 70 hours of playback Compatible App: JBL Headphones (Japanese selectable) JBL Headphones Wireless Noise Canceling Bluetooth Chinese Version Authentic Black 770NC Long Playback Sound Quality Priority ANC App Integration Commuting High Sound Quality