Neiko 20741A Digital Torque Adapter, 1/2" Drive | 147-750 Foot-Pound | Audible Alert Converts any ratchet wrench into a precision torque wrench; accurate calibration device for existing digital and analog torque wrenches Three color LED light indicator and audible sound once torque setting is reaching Adapter turns off after 80 seconds of no usage Two types of modes: peak mode indicates when a specific level of torque is reached and trace mode actively shows how much torque is being applied on the display Range:40-200 N-m (29.5-147.5 ft./lb.), Accuracy: +-2% , Unit: Kg-m, Kg-cm, lb.-in, N-m, and Memory:50