Charging Method: Put the earphone in the charging case and lock it, the earphone will be automatically charged, the earphone will light up with red light when charging, and the light fade when charging is full. Charging in the charging case: after connecting the data cable, a red light will be on the charging case, and the red light fade when full charge is complete. Product features: Play and stop the song (1 pres), Answer and end the call (1 pres), Siri PDA call (Long press for 1 second), Volume Reduction (press 3 times), Turn back the previous song (press 2 times), Turn on/off (long press for 5 seconds).