We will always provide you with our professional advice, as well as satisfactory and fast customer service.Main Functions Onoff switch power on and offH key: hold the readingZero function: reset the readouts Parameter: Name: Shore Hardness TesterMeasuring range: 0-100H (ACD)Resolution: 0.5H (ACD)Needle stroke: 0-2.5mmData lock function: YesResponse time: 1 secondBattery: 1.5V button battery (not included)Size: 84*57*26mmWeight: 129G Application: 0-100HA: Used to measure rubber, synthetic rubber, soft rubber, multi-element resin, leather, wax, etc.;0-100HC: Used to measure microporous materials made of combined rubber and plastics, plastics containing foaming agents;0-100HD: Used to measure super hard rubber, resin, acrylic, glass, printing plate, fiber, etc. Different hardness testers can be selected according to the hardness of the material, 0-100HA (harder)>A (hard)>C (soft) Package Content: 1x Digital Shore Hardness Durometer