Features: There are 3 types, RM-135, RM4-200, RM4-340, selecting based on your needs. Used with a common ratchet wrench as a digital torsion wrench with the same function as a digital torsion wrench. Three torque units : kgf.for cm, N.for m, lbf.in, it can be switched freely. With power saving function,it will automatically shutdown after 60 seconds without being used. This product is fully functional, compact and easy to carry, cost-effective, widely used in machinery, aviation, railway, maintenance, testing and other fields. Buzzer & LED light alarm prompt,and the measuring accuracy up to ±2%. Specifications: Material: Tool Steel Size: 7.8x6.5cm/3.07x2.56in Type: RM-135/ RM4-200 /RM4-340(optional) Resolution: 0.1 Accuracy: ±2% Battery: 3xAAA Package Includes: 1x Torque Wrenches Adapter 1x Calibration Report 1x Manual note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.