Easy matching, take out from the charging bin and enter the matching mode automatically. Using cdn bluetooth 5.0 chip, the sound quality is better and the battery is used longer. I12 headphones are charged by magnetic contact, which makes charging easier. Supports the use of single earbud and double earphones. One-button touch design, easier to use. 10 m effective transmission distance. Widely compatible with various bluetooth devices on the market. True stereo wireless binaural, with voice prompts, ios mobile phone supports power display. Call answering, hanging up call registration, hanging up, listening.