Feature Highlights: 1. Wide Compatibility – This control board works with 2106/161/169 brushless electric wrenches and 18V/21V brushless angle grinders, making it a versatile replacement part. 2. Universal Design – Fits most common brushless angle grinder drive control panels. Board size is 5.3x6.3 cm, with a drive voltage of 18V (5-series lithium battery, fully charged 21V) and 300W power output. 3. Battery Flexibility – Can be used with battery packs labeled 48V, 68V, 88V, 98V, 128VF or TV—actual voltage is 18V (5S2P or 5S3P lithium configurations, fully charged to 21V). 4. Durable Build – Made from sturdy plastic and metal for reliable performance and longer service life. 5. Easy to Install – Includes control board and switch for straightforward replacement. Follow the setup steps to ensure smooth operation. Product Details: This universal brushless drive control board is designed for 2106/161/169 electric wrenches and 18V/21V angle grinders. It delivers stable power output up to 300W and supports multiple lithium battery configurations. The board is compact (5.3x6.3 cm) and built from robust materials to withstand daily use. Before testing, ensure the motor is connected and secured, the housing is closed, and the square shaft rotates freely to avoid alarm triggers. Perfect for DIY repairs and tool maintenance. Specifications: - Color: Black - Material: Plastic + Metal - Package Includes: 10 x Control Board, 10 x Switch - Note: Only the listed items are included. Slight color variations may occur due to lighting and screen differences. Measurements may have an error margin of +/- 1–3 cm. Usage Tip: Always install the board correctly—fix the motor, close the case tightly, and check that the square shaft turns smoothly before powering on. Lower the speed control switch fully to avoid buzzing or alarm sounds. This helps prevent damage to the board.