Sensky JSQ012 100ml Small Humidifier with USB Port, Portable Humidifier Can Be Carryed Anywhere, Personal Humidifier for Office Worker,Mini Humidifier for BabyCan't add essential oil into the tank Abs Imported Power supply:DC5V Lenght of power line:About 99 cm Capacity of water tank:100ml LED lamp:1 pieces working time:2 hours