Beer refractometer Beer tester 0-32%Brix; SG: 1.000-1.120 beer refractometer with ATC is an upgraded version of RSG-100ATC with an additional features of BUILT-IN CALIBRATION KNOB, has much LIGHTER WEIGHT, and LONGER Model:HT515ATC Beer refractometer Measuring Range: 0-32%Brix; SG: 1.000-1.120 Minimum Division: 0.2%Brix; 0.001sg Accessories included: 1pc Pipette Operations manual Mini-screw driver firm grey&blue plastic case