Accurate and reliable, Detecto's economical DR series platform scales are lightweight and portable, making them perfect for mobile clinics and home healthcare nurses. They feature a non-skid mat to enhance patient safety when getting on and off the scale and a large 1 inch (25 mm) high LCD display. Powered by 6 AA batteries (not included) or AC adapter (included), the DR series features 4 keys: LB/KG, Tare/Hold, On, Off. RS232 serial port for printer connectivity. Optional carrying case with handle protects scale during transport and storage. Platform size: 12 D x 12 W x 2 H inch (35 D x 35 W x 5 H cm). 400 lb / 180 kg or 550 lb / 250 kg capacities available to choose from. Optional stainless steel wall-mount grab bars also available for patient stability (1 per item).