Three torque units: kgf.for cm, N.for m, lbf.in, freely switchable Use in conjunction with a regular ratchet wrench to use as a digital wrench with the same function as a digital wrench This product is fully functional, compact, easy to carry, cost-effective, widely used in the fields of machinery, aviation, railway, maintenance, testing, etc Power saving function automatically shutdown after 60 seconds when not in use There are 3 types of RM-135, RM4-200, and RM4-340, so you can choose according to your needs, Manufacturer: NUEAYMS