New product. I am selling it because I have another one I am using. Ultra Noise Cancelling 3.5 Anker's unique Ultra Noise Cancelling technology has evolved to 3.5. We have pursued immersion in music. It also detects wind and automatically reduces wind noise (*). *To activate this function, you need to turn on "Wind Noise Reduction" in the soundcore app settings. 180 Noise Detections per Minute Seven sensors detect ambient sounds and noise 180 times per minute and automatically remove them according to the scene. It removes noise from all angles, achieving noise cancellation with approximately 3 times (*) the intensity. Based on Anker's own tests, it removes up to 12.2dB of noise in the 600-700Hz range. Comparison with the case where the noise canceling function is turned OFF. Long Playback & Short Charging Time Up to 10 hours of music playback with the earphones alone, and up to 40 hours with the case (*1). It also supports short-time charging, allowing for up to 4 hours of music playback with just 5 minutes of charging (*2). It also supports wireless charging. *1 When noise canceling is turned OFF. Playback time varies depending on volume and usage environment. *2 When charging via the USB-C port. Product Information Size: Approximately 6.5 × 6.2 × 3.0cm Weight: Approximately 62g Ultra Noise Cancelling: 3.5 (Optimized for environment + wearing condition / constantly detects) Supported codecs: SBC / AAC / LDAC Driver: A.C.A.A 4.0 (10.5mm + 4.6mm) Playback time (earphones / charging case): 10 hours / 40 hours Short-time charging (charging time / playback time): 5 minutes / 4 hours Earphone body control: Swipe control + pressure sensor control Ear tips: Liberty 4 Pro exclusive ear tips 6 sizes Communication method: Bluetooth 5.3 Package contents: Earphone body, charging case, ear tips (6 types), USB-C & USB-A cable, Quick Start Guide & Safety Manual, Technical Conformity Mark certified product (Frequency band: 2.40?2.48GHz)