Error: Bidirectional reading error is ± 2% clockwise and ± 2.5% counterclockwise. It can be applied in forward and reverse directions to improve work efficiency. Unit: kgf.cm, N.m, lbf.ft, lbf.in. With sound and light alarm function and backlight function, it is convenient to operate at night or in places with insufficient light. Three working modes can be switched freely: real-time mode, peak mode, preset mode. Power: AAA battery * 2pcs Automatic shutdown: The product will automatically shut down after 10 minutes without operation., Manufacturer: MMHHHG