Description: The product is suitable for Dayi 2106/161/169 brushless electric wrenches. Brushless sensorless angle grinder drive control board general. Control board drive voltage: 18V (5 strings of lithium batteries, fully charged 21V), power 300W. The battery pack marked with 48V, 68V, 88V, 98V, 128VF or TV can be used, and its voltage is actually 18V (5 series 2 parallel 10 cells or 5 series 3 parallel 15 lithium batteries, fully charged 21V) . Before testing the machine, you must first connect the wire, fix the motor, install the case, tighten the screw, make sure that the square shaft of the head can be easily rotated without jamming, connect the power supply. Press down the speed control switch so that there is no gap in the shell! To prevent damage to the motherboard, please follow the requirements. Specification: Type: Electric wrench brushless motor parts Motor /Control Board/ Switch Control board drive voltage: 18V(21V) 300W Suitable for: 2106/161/169 brushless electric wrench Size Chart: 63x52.3mm/2.48x2.06inch 63x52.3mm/2.48x2.06inch 60x26mm/2.36x1.02inch Package Includes: Optional Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!