This is an air conduction headset that can be used without blocking your ears. You can work while listening to the surrounding sounds, and it's comfortable to use because your ears won't get stuffy. It has a unidirectional microphone, so it only picks up sounds around your mouth and is less likely to pick up surrounding noises. The images show everything included, and it can be powered via Type-C. I used it for a day, but it seems my head is too big, and the U-shape has widened, causing the microphone to face outwards. Because it has a function to only pick up sounds around the mouth to avoid picking up outside noise, my voice became distant. Perhaps it would work for people with a normal head size... ● Lightweight at only 21g, making it less likely to cause ear pain. ● Unidirectional long microphone + dual microphones for clear communication even in a low voice. Equipped with two microphones, one for calls and one for noise cancellation. Your voice is clearly picked up by the unidirectional long microphone located near your mouth, and surrounding noise is reduced by the noise-canceling microphone. ● CVC noise cancellation further reduces noise. Equipped with CVC (CLEAR VOICE CAPTURE) by IC. ● IPX4 water-resistant ● Transmission method: GFSK ● Supported codecs: SBC ● SCMS-T: Supported ● Bluetooth 5.2 compliant ● Frequency range: 2.4GHz band ● Transmission output: Class 2 ● Communication distance: Approximately 10m maximum *Varies depending on the usage environment. ● Supported profiles: A2DP, AVRCP, HFP ● Power: Lithium polymer battery Charging time: 2 hours Continuous playback time: Up to 8 hours (14 hours at 70% volume) Continuous talk time: Up to 6 hours (9 hours at 70% volume) Continuous standby time: 220 hours ● Waterproof rating: IPX4 ● Playback frequency band: 20-20000Hz ● Microphone sensitivity: Main MIC/-38±2dB Sub mic/-40±1dB ● Driver unit size: 16ohm15×11mm ● Microphone directivity: Unidirectional ● Charging port: USB Type-C ● Connection method: Bluetooth ● Noise cancellation: CVC (by IC) Dual microphone noise cancellation ● Size: Approximately W139 x D110 x H48mm ● Weight: Approximately 21g ＜Battery＞ ● Quantity: 1 ● Type: Lithium-ion ● Weight: 8.5g ● Capacity: 400mah ● Energy: 1.48wh ● Voltage: 3.7V