A beautiful addition to any home or business. This is my 'go to' daylight scenting system for my own home as it's fuss free, quick to scent, efficient, giving circa 6 hours of constant fragrnace in your home and most imortantly 'safe' as the diffuser will auotmatically cut out if the water runs out... The unit is 12cms high and 9cms wide and whilst not the most beautiful on the market, its clean lines will easily blend into any room.  It has to be mains connected, but the beauty of this machine is that it has a Type C USB cable which means you can plug it into a power pack and move it into the garden if you want to create a memorable space outdoors at a party for instance.  It's just amazing is all's I can say...