Digital Torque Adapter Accuracy : ±2% Memory : 50 Display resolution : 0.1 N·m / ft·lb ,0.01 kgf.m Operation Mode : Peak/Trace Unit Selection : kgf·m, ft·lb, N·m Battery : AAA x 2 PC.(Battery not included) Battery Life : 110hrs (continuous operation) Operating Ambient Temperature : -10ºC - 60ºC (13.9ºF -139.9ºF) Storage Temperature : -20ºC - 70ºC (-4ºF - 157.9ºF) Operating relative humidity : 15 to 90% noncondensing Auto shut off : 70 seconds (if do not use electronic torque adapter.) LED indicator : Green. Red Overload Alarm : 34207-1A: 37.5 N·m (27.6 ft.lb.) 34307-1A: 168.8 Nm(124.5 ft.lb.) 34407-1A: 250 N·m (184.4 ft.Ib.) Calibration must be done regularly to ens