1Used with a common ratchet wrench as a digital torsion wrench with the same function as a digital torsion wrench. 2This product is fully functional, compact and easy to carry, cost-effective, widely used in machinery, aviation, railway, maintenance, testing and other fields. 3With power saving function,it will automatically shutdown after 80 seconds without being used. 4Buzzer and LED light alarm prompt,and the measuring accuracy up to 1%, supports third-party metering. 5Peak/tracking conversion mode, real-time display, record peak,50 torsion can be reserved maximum.Item Type:Torsion Adapter Material:Tool Steel Surface Treatment:Polishing and Chrome Plating Model:BDA2-030,BDA3-135,BDA4-200,BDA4-340(Optional) Accuracy:+-2% Memory:50 Sets Operating Mode: Peak / Patrol Unit Options: Kg /m, Kg / cm, Inches / Pounds, Feet / Pounds, N / m Battery: 2 x AAA Battery(Not Included) Operating Temperature: -10~60 Storage Temperature: -20~60 Relative Humidity: 15-90% Auto Power Off: 80 Seconds Size: Approx. 75 x 45 x 45mm / 2.95 x 1.77 x 1.77in Type Resolution Display Range Alarm Range Accuracy Ensurance Range Driver Tip Applicable Wrench/Socket BDA2-030 0.01 0.3~30N.m 1.5~30N.m 6~30N.m 1/4in DR 19mm for 3/4 Wrench and Socket BDA3-135 0.1 1.35~135N.m 6.8~135N.m 27~135N.m 3/8in DR 12.5mm for 1/2 Wrench and Socket BDA4-200 0.1 2~200N.m 10~200N.m 40~200N.m 1/2in DR 10mm for 3/8 Wrench and Socket BDA4-340 0.1 3.4~340N.m 17~340N.m 68~340N.m 3/4in DR 6.3mm for 1/4 Wrench and Socket 1 x Torsion Adapter1 x Users Manual1 x Report