Features 1、3 speed regulation modes: Control panel potentiometer control, external voltage control and external PWM control. 2、2 start and stop modes by control panel or external I/O. 3、Maximum speed control of 12000 RPM. 4、M542 standard heat dissipation housing + plastic housing. 5、Suitable for DC brushless spindle drive control of engraving machine. Specification Features: 2 start and stop modes by control panel or external I/O. Maximum speed control of 12000 RPM. M542 standard heat dissipation housing + plastic housing. Suitable for DC brushless spindle drive control of engraving machine. Specification: Output power: Max. 400W Max. speed control: 12000rpm Weight: Approx.1468g / 51.8oz Package list: 1 * 400W DC Brushless Spindle Motor without Hall (ER8 Collet) 1 * Motor Driver Note: This product comes with integrated shank +ER8 collet, which cannot be replaced with ER11 collet. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List