Error margins ± 2% clockwise and ± 2.5% counterclockwise, suitable for both forward and reverse directions to enhance efficiency. Switch easily between four torque units kgf.cm, Nm, lbf.ft, and lbf.in. Equipped with sound and light alarms, plus a backlight for easy use in low light conditions. Choose from three working modes real time mode, peak mode, and preset mode for versatile applications. Requires 2 AAA batteries (not included) and features an automatic shutdown after 10 minutes of inactivity., Manufacturer: TIEOAXFT