Durable enough for nearly any situation indoor or out. The 10" diameter wheel with vinyl tread gives you outstanding stability in all terrain. Five digit counter reads up to 10,000 feet in feet and hundredths of a foot. Display can change from feet to meters with the push of a button. Memory feature lets you store individual measurements for accumulation. Bright orange spoke color for increased visibility in the field. Weight 4.3 lbs. USA made. See the Soft-sided Carrying Case for Series 31 wheels, Item No. C31M.