SPECIFICATIONS Display：4 digits, 10 mm LCD Range：0~100 Resolution： 0.1 Presser foot: 80mm diameter Indenter: Extension 2.54mm 25.2mm Cylinder Spring force: 455gf Measurement deviation: ≤ ±1 Power supply: 4x1.5v AA (UM-3) battery Operating condition: Temp. 0~50℃ Humidity <80% Size：162x65x28mm (6.4x2.6x1.1inch) Weight：about 490g （not including batteries） PC interface: RS232C interface Power off : 2 modes Manual off at any time by depressing the power key till OFF shows on the display or Auto power off after 2 minutes from last key operation . Accessories： Carrying case 1 pc. Operation manual 1 pc.