When charging begins, the power lamp is shown as red, and when it turns blue or green, the power can be unplugged; Some Bluetooth charging power lights start to blink, when the long light does not flash can be unplugged; Depending on the battery power, the charging time can be about 2 hours or 4 hours; Good performance Bluetooth headset, fully charged after listening to music 12 to 15 hours, or even up to 20 hours, if the listening time is too short, indicating insufficient charging, need to be recharged; If the battery is often not charged, there is a problem with the Bluetooth battery, you can replace the new battery or consult after-sales service.