The Mi charger can be used as a Bluetooth headset. The charging input voltage of the Bluetooth headset is also 5V, the same as the Xiaomi charger. The Xiaomi charger has a 1A current output, which is 200mA higher than the Bluetooth machine, but the Bluetooth headset also has a charging control circuit inside, which will limit the charging current and time. So don't worry about burning out. It just takes less time to charge. For poor quality Bluetooth headphones, there may be no protection circuit design, it is recommended that the computer USB charging is safer, USB only for 0.5A current, closer to the needs of Bluetooth headphones.