Error margin Bidirectional reading error is ± 2% clockwise and ± 2.5% counterclockwise, supporting both forward and reverse use for enhanced efficiency. Switch between four torque units kgf.cm, Nm, lbf.ft, and lbf.in., making it versatile for various applications. Equipped with sound and light alarms, plus a backlight feature, this tool is convenient for low light environments. Choose from three working modes real time mode, peak mode, and preset mode to suit your specific needs. Powered by two 7# batteries, this torque wrench also features an automatic shutdown function after 10 minutes of inactivity., Manufacturer: TIEOAXFT