features and benefits: allows automatic charging or recovery operations can be used with all type refrigerants advanced charge and recovery modes – uses tare weight and maximum capacity of cylinder to calculate maximum charge/recovery available user programmable memory for up to 99 different stored values “repeat” charge feature the ultimate for automating a/c and refrigeration system recharging operations in a portable unit! completely portable, battery powered, can be used with all refrigerants. memory handles 99 different stored values. three display modes: lbs./oz.; decimal lbs.; kilograms. very high resolution: 0.2oz. (0.010 lbs.) (4 grams). 200 lb. Or 100kg capacity. compact design: completely portable, battery powered. low battery indicators.