The open ear plug design has been carefully shaped and rigorously tested to fit the natural curves of your ears, greatly improving wearing comfort and stability. ot in the ear, not swollen or painful, more suitable for long-term wear., Open the cover and turn on the phone, automatically pair it, and put the headphones into the charging compartment and close the cover to automatically turn off. Supports music playback/pause, switching between up and down tracks, summoning Sir operations, and binaural calls. The open ear plug design has been carefully shaped and rigorously tested to fit the natural curves of your ears, greatly improving wearing comfort and stability. Not in the ear, not swollen or painful, more suitable for long-term wear. Charging voltage DC5V Headphone charging time is about 1.5 hours Charging time for charging box is about 2 hours