Features: brand new and high quality The product is suitable for Dayi 2106/161/169 brushless electric wrenches. Brushless Angle Grinder Drive Plate Polishing Machine. Product Dimension: approx. 62.5x52.5x19.5x21.5x39mm/2.46x2.07x0.77x0.85x1.54inches. 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) . Specifications: Material: Plastic + Metal Style: Control Panel, Control Panel + Pins Color: As the Picture Shows Product Dimension: approx. 62.5x52.5x19.5x21.5x39mm/2.46x2.07x0.77x0.85x1.54inches Net Weight: 15g/0.03lbs 30g/0.07lbs Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1PC Brushless Electric Wrench Drive Board