ACDelco ARM302-4S 1/2" Electronic Digital Torque Adapter, 12.5-250.7 ft-lbs, Buzzer/LED Flash Notification - ISO 6789 Standards Certificate of Calibration 12.5 to 250.7 foot pounds wide torque range with LED flashing / buzzer alarm when torque is reached. Easy to read LCD display with measurements (kg-cm, N-m, in-lb. ft-lb) Multiple Setting Functions: Torque, Measurement, and, Peak & Trace, Mode Settings. (Torque setting range: 10% of max torque value. Measuring range: 4 to 99 ft-lbs.) Guaranteed Accuracy Range:  1.5% clockwise  2.5% CCW of indicated value, CW, from 20% to 100% of full scale  CR2032 Coin sell batteries required to operate the adapter. The product quality meets or exceeds ASME B107.14-2004, ISO 6789 standards, individually serialized with matching certificate of calibration traceable to N.I.S.T. 1 Year ACDelco Tools Limited Warranty: One-year limited manufacturer's warranty against defects in materials and workman ship.