Specifications Model HT-225D Display OLED digital Measuring range 10-70N/mm2 Accuracy 0.1R Impact energy 0.225kgm (2.207Nm)for testing ordinary building and bridge construction Communication USB2.0 or Bluetooth(optional) Storage data for 4000 concrete structures Operating temperature -40-60C Power supply 3.7V Li-ion rechargeable battery charged via USB port Dimension (mm) 280x75x60 Net weight 1.1kg