Dr. Trust Micro Mesh Nebulizer Manual page 8

Attention
 Do not mix different types of batteries.
 Battery life may be different depending on type of the batteries used.
■ How to use the AC adapter (with USB connector)
1. Plug the USB connector into the main unit's power
supply inlet.
General Recommendations

Please unplug the AC adapter after use. Do not leave it connected to
the power supply for a long time.
2. Plug the AC adapter into an electric
outlet.
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