?Basic Specifications and Product Warranty?: Plug: 3.5mm / TYPE-C / USB-A, Length: 2.5m, Microphone: 2 types, Silent mute: Yes, Driver: 10mm dynamic driver unit. Please feel free to contact our customer service if you have any problems such as no sound from the earphones or initial defects. ?Durability and Wide Range of Support?: The cable with the fish scale pattern is flexible enough and durable. The cord is not easily entangled and there is no need to worry about disconnection. Type c wired earphones are widely compatible with laptops / mobile phones / i-Pad pro (2018) and other devices with type c earphone jacks. ?Canal Type-improved Sound Insulation?: A20 conference earphones are ergonomically canal type, which fits tightly to the ear, detects ambient noise, and cancels noise by generating back sound waves. Most environmental noise is effectively blocked, making it easy to hear the other party's voice even in a noisy space. The sealed design can also enhance the experience of sound. ?Remote Control Independent Installation?: Two types of microphones are installed separately, the distance to the mouth is closer, the sound collection performance is improved, and the noise canceling function is installed, so noise-free voice can be produced with a sensitive microphone. It can be transmitted stably. Slide to adjust the volume and press the button once: play / stop / answer / end call, press twice continuously: forward song, press three times continuously: return song. ?Microphone Mute Function?: Unlike ordinary wired earphones, this product has developed earphones with a microphone mute function based on various customer demands. The microphone has a mute function, which makes the interaction between members smoother. You can hear the other person clearly, which greatly improves the efficiency of work and study. Specially suited for online activities such as telework, ZOOM, web conferencing, distance learning, and games.