Got this to weigh my little Bandito after my roommate wouldn't stop complaining that he was too heavy and wanted to monitor his weight (and no he's not fat, he's part Main Coon). After assembling, the tray makes it a bit awkward for storing when not in use. On the other hand, if used for a baby and not a cat it might be perfect to leave up in baby's room.It weighs in kg, ounces and pounds and seems to be very accurate as well as sensitive... I like that. You can also measure the length of baby on the tray. I think it's metric, tho it also comes with a tape measure which I just lay along side the height/length measurement in the tray. I also love that it takes AAA batteries (included) rather than those button batteries. It's a great scale.