I bought this to use with my comgrow 5w laser and ender 3 v2. It works great right out of the box with LaserGRBL. The PWM feature is a must-have if you are doing anything other than cutting at full power, and most 3D printers are not going to be able to support that. The PWM rate coming off the printer's fan controller is not the same as the pwm needed for the laser. This box was all I needed to get that working.