Used a few times. I am selling it because I purchased a different product. Model number: J076 Type: Ear-hook type, open-ear Frequency characteristics: 2.402GHz~2.480GHz Material: ABS resin Battery: Lithium polymer battery Battery life: Up to 6-8 hours (at 80% volume or less) Battery capacity: 180mAh Charging method: Magnetic charging Charging time: Approximately 2 hours Charging voltage: DC 5V Packaging size: Approximately 14*12*5.5cm Weight: Approximately 32g Bluetooth standard: Bluetooth 5.2 Warranty period: 1 year 【Clear and crisp sound quality】 Equipped with a Bluetooth 5.2 chip for excellent connectivity and stability, and a 270° adjustable microphone, achieving high-quality calls. Perfect for telework, web conferences, and working from home! 【Open-ear design】 When doing sports like jogging, you can hear both the music and approaching cars. You won't miss surrounding voices during online meetings. 【Ergonomic design】 It fits securely even with vigorous movement, minimizing the burden on the ears, and is designed to be comfortable even for long periods of wear.