1. Error: two-way reading error clockwise ±2%, counter-clockwise ±2.5%, can be reversed to apply, improve work efficiency. 2. Free switching of four torque units: KGF.CM , N. M, lbf. FT, Lbf.in . 3. With sound and light alarm function and backlight function, easy to operate at night or in places where the luminosity is insufficient. 4. There are three working modes: real-time mode, mode and preset mode. 5. Automatic shutdown:the product does not operate 10 minutes automatic shutdown Digital Display Torque meter is a torque monitoring instrument with ratchet wrench, which is used for fastening and dismounting control dynamics. It has the features of simple operation, portability, multi-unit conversion, sound prompt, and inverse adjustment, etc. , widely used in automobile, bicycle, all kinds of mechanical maintenance and other industries. Overload protection: product afterburner to 120% of the full range, the screen show "Olord" , overload, can not continue afterburner. Power Supply:2 x AAAbatteries(Not included batteries) Tips:The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Colour:Black Material:Metal Package Contents: 1 * Digital display torque meter 2 * socket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.