This 220 lb. capacity electronic scale is constructed from rigid die cast aluminum for long lasting durability and reliability. Heavy duty load cell, built-in overload protection. Low battery warning with auto power off. Reading may be zeroed out at any time. Reliable membrane key pad switches. Measures lb., oz. & kg. Extra large LCD display. Display unit is desk or wall mountable. Includes: 1 "9V" battery. Molded hard case. Meets NIST standards. Accuracy +-1%. Meets UL guidelines.