Easily and accurately wrench to torque specifications with this 1/2" Electronic Torque Wrench (25 - 250 ft/lbs) from Armstrong. Comes with easy to set pre-set target torque with scroll buttons and an audible buzzer plus red, yellow and green indicator lights that alert the user when the target torque is approached and reached. (Red light comes on at 96% of preset value to allow for human reaction time.) Equipped with an LCD screen that indicates torque as it is being applied and the screen comes with a backlight for easy reading of torque values. The wrench makes simple torque unit conversions with the push of a button (ft/lbs, in/lbs, Nm). A sleek tapered head with a low profile design along with the 60 tooth gear with a 6 degree ratcheting arc permits access in extremely confined areas. Accuracy of +/- 2% CW, +/-3% CCW from 20% to 100% of wrench capability. Operates on 4 AAA batteries for up to 40 hours of continuous operation. Meets or exceeds ASME B107.28 specification.