Usage：1. Plug and play. 2. Do not use it with high-power players. 3. Function button: when a call comes, press once to answer. During a call, press once to hang up; For some cellphone, you need long press to hang up. When the music is playing, press once to pause, twice for the next track, three times for the previous track.
Feature：Comfortable to wear.
Caution：1. Keep away from water and fire. Do not pull the cord or disassemble the product. 2. It is recommended to try it out before purchase. 3. The packaging contains important information and should be kept.
