With power saving function,it will automatically shutdown after 60 seconds without being used Used with a common ratchet wrench as a digital wrench with the same function as a digital wrench 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% Three torque units : kgf.for cm, N.for m, lbf.in, it can be switched freely, Manufacturer: XIAOQENAN