With nine separate torque value setting connections with individual tolerances torque and measurements the user has a range of torque requirements pre-programmed for ease of use. - The torque wrench will warn you by both a light and sound when approaching its torque (orange light) when you are within tolerance (green light) and if you tighten above their tolerance settings (red light). - For each torque setting the last nine torque values are individually saved for later use. - Powered by standard AA batteries. - Supplied in a plastic case for safe storage. - Meets or exceeds the requirements of ISO6789: 2003 and is supplied with calibration certificate. - Accuracy ±1%. Drive: 1/2 inch Torque Range ISO: 20-200 Nm Torque Range Imperial: 15-150 Ibf.ft No. of Teeth: 45 Length: 548 mm