Compared to other diode laser engravers, the Twotrees TS3 took a different design route with its enclosed design and they have made the machine more similar to the CO2 laser engravers. With SD card offline engraving capability, USB and Wi-Fi connectivity and a smartphone app, the machine is truly versatile! The Twotrees TS3 features an air filtering system, although you can also vent the fumes outdoor. Watch this review video if you want to learn more about this machine and see how it compares to similar machines in this price range!