Detecto?s 8440 baby scale is perfect for home health care or wherever space is limited and performance is paramount. Power requirements are one 9V alkaline battery (not included) and one 3V CR2032 lithium backup battery (included) for memory.?Tray dimensions are?20.6 W x 10.5 D x?4 H inch (524 W x 267 D x?102 H mm). Display options include date and time as well as storage of previous weight on a large 1 inch (25 mm) high LCD screen. 44 lb x 0.5 oz / 20 kg x 10 g capacity.