I purchased and set this up a week ago. I used a ceramic water bowl instead of the Pure Crystal, but my pet didn't seem to like it much, so I'm selling it. It doesn't warm the water to the point of being lukewarm. The room temperature was 23 degrees Celsius, and the water without the warmer was 17 degrees Celsius, but the water on this warmer stayed around 27 degrees Celsius. This may vary depending on the bowl and the amount of water. Pet water warmer, perfect for cats and dogs that don't like cold water. - Brand: GEX - Model Name: nurumi - Function: Water warmer - Features: For pets that dislike cold water - Safety Design: Dual safety design - Size: Plate diameter approximately 20cm