Bluetooth 5.0 chip, low power consumption and supports automatic pairing upon startup Master-slave switch, supports monaural and binaural HD volume calls Simple touch operation, touch to switch between multiple functions of music/call Separate left and right earphones, ergonomically designed for half-ear and comfortable to wear. Charging box/storage box 2-in-1, compact and portable Supports IOS battery display About 16 hours of battery life; 3.5 hours of playback on a single charge, and the charging box provides an additional 12 hours.