Lightweight wireless earphones with 99.9% noise-canceling function Even when speaking in front of a railroad crossing, the other person can hear your voice. The other person cannot hear the sound of the railroad crossing, or can barely hear it. I have used it about 3 times, but I am not good with open-ear type, so I am selling it. There are no noticeable stains or scratches. All accessories are included: microphone, charging cord, and instruction manual. - Model Name: NaviBook AI Pro NB204 - Bluetooth Version: 5.4 - Battery Capacity: 600mAh - Noise Canceling: 99.9% - Charging Port: USB-C - Charging Time: Approximately 1.5 hours (full charge) - Playback Time: Approximately 34 hours (8.5 hours for earphones + 3 charges from charging case) - Continuous Playback Time: Approximately 8.5 hours - Talk Time: Approximately 3 hours - Waterproof Standard: IPX4 - Accessories: Detachable magnetic microphone Thank you for viewing. Earphones Headset Bone conduction Open ear Telework Wireless Conference Other features: Noise canceling