This is a professional universal torque wrench with high precision and practicality. It can be widely used in machinery, aviation, railway, maintenance, inspection and other fields.   Features: Just add a common ratchet wrench to become a digital torque wrench with the same function as a normal torque wrench.  Full-featured, small and compact, easy to use and carry.  It can be widely used in machinery, aviation, railway, maintenance, inspection and other fields.  The storage box can better protect and store tools and accessories.   Specifications: Material: plastic+steel;  Color: black;  Battery: 2 * AAA battery (not included);  Battery life: 2500 times;  Accuracy: ±2%;  Memory: 50;  Display resolution: 0.1;  Display range: 2-200Nm;  Alarm setting range: 10-200Nm;  Accuracy guarantee range: 40-200Nm;  Drive: 1/2 inches;  Operation mode: peak, track;  Unit selection: kg-m, lb-ft, N-m;  Operating ambient temperature: -10℃-60℃ (13.9ºF-139.9ºF);  Storage temperature: -20℃-70℃ (-4ºF-157.9ºF);  Operating relative humidity: 15 to 90% noncondensing;  Auto shut off: 70 seconds (if do not use digital torque adapter);  Low battery display reminder: yes;  Alarm: when the preset torque range reaches 80%, the sound will alarm and LED light will flash;  LED indicator: red;  Torque wrench length: 80mm / 3.1in;  Torque wrench weight: 213g / 7.5ounce;  Package size: 125 * 95 * 65mm / 4.9 * 3.7 * 2.6in;  Package weight: 413g / 0.9lb;   Package List: 1 * Digital Torque Wrench;  1 * 1/2 to 3/8 Adapter;  1 * 1/2 to 1/4 Adapter;  1 * User Manual;  1 * Box