Airpro Mask battery charger with USB port, charge the Airpro Mask unit and the backup battery at same time.
Charger only, Battery is not included.
When the battery is fully charged,automatically stop charging.
Safety cut out circuit,Built-in protection circuit prevents overcharging.
Constant current,constant voltage charging,automatic identification.
The high-quality LCD screen indicates connection and full charge.
Input: AC 100-240V 50/60Hz 150mA
Output: DC 4.2V ; USB Port Output: DC5.2V