The YAMAZEN Steam Cube MAG humidifies a room of approximately 8.5 tatami mats with its 500ml water tank. - Brand: YAMAZEN - Model Name: Steam Cube MAG - Water Tank Capacity: 500ml - Humidifying Capacity: Approximately 8.5 tatami mats - Power Cord: Included - Design: Top plate with silver decoration Easy top-fill design, just like a pot! Used a few times, so there are water spot marks on the underside of the lid, etc. Please check photos 2-3.