Features: The heads has a quick-release button and a ratchet function, which can be operated both clockwise and counterclockwise. The clockwise accuracy is 2%, and the counterclockwise accuracy is 2.5% (20% to 100% of the full measuring range) Dual alarm function: the bu-zzer and LED indicator will warn you when the predetermined torque value is reached. This digital display wrench has powerful operating functions, such as unit setting, value storage, value output value correction and other functions. Four units for you to choose from (N.m, kgf.cm, Ibf.tf, lbf.in) and with three measurement modes: real-time mode, pe-ak mode, preset mode. Five minutes without any operation will enter the power saving mode, save the energy.