2.1 watt (2100 mW) diode laser cutter / engraver attachment for 3D printers and CNC devices Laser cuts up to 0,2 inch of plastic, wood, plywood, acrylic. Laser engraves on any surfaces except metal Laser is reliable and endurable. Can work 48 hours non stop Laser is efficient. Ajustable focal length: 1-4 inches