It is a 637nm 15W red laser system. The high-power laser generates a lot of heat when it works, and a heat sink is added at the bottom of the laser module. The radiator is equipped with 3 fans. When the laser is turned on, be careful not to cover the front and rear to avoid affecting the heat dissipation performance. https://www.civillaser.com/index.php?main_page=product_info&products_id=2783