The JB ATLAS refrigerant charging scale is designed for the HVAC/R industry. Everyday users will appreciate the advanced solid state load cell for superior sensitivity (0.25 oz/ 10 gm) and accuracy. The ATLAS's 220 pound (100 kg) weight capacity, all metal construction, heavy duty plastic storage case, and easy-to-read hand held combine to make the ATLAS the best overall package in the industry. Pound for price, our 220 pound scale competes at a 110 pound price. Operates with a 9-Volt battery (not included).