Button-operated, stand-alone humidifier with a transparent tank to check the water level. - Color: White - Type: Stand-alone humidifier - Operation: Button-operated - Features: Transparent tank allows water level check - Top design: Round water inlet Thank you for viewing. This humidifier is incredibly easy to fill with water. It feels like it holds about 3 liters. Although there are marks as shown in the photo because aroma oil was not put in the designated area, there are no problems with its use. It was used for one and a half years. It was purchased about three years ago. No instruction manual. The box will be a cardboard box.