<p>The product is suitable for 2106\/161\/169 brushless electric wrenches. It has been tested before selling OK.</p> <p>18V 21V Brushless Angle Grinder Drive Plate Polishing Machine General Control Panel Size 5.2x6.2CM</p> <p>Brushless sensorless angle grinder drive control board general</p> <p>Control board drive voltage: 18V (5 strings of lithium batteries, fully 21V), power 300W.</p> <p>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 21V) .</p> <p>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--- down the speed control switch so that there is no space in the shell! Otherwise, there may be a buzzing alarm! </p> <p>To prevent damage to the motherboard, please follow the requirements.</p> <p>Colour:As shown</p> <p>Material:Plastic + Metal</p> <p>type:B</p> <p>Package Contents:</p> <p>1 x Control board</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light 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.</p>