### Perfect Fit for Ender-3 S1 Series Specially designed for Creality Ender 3 S1 / S1 Pro / S1 Plus / V3 KE, plug-and-play installation without firmware modification. Prevent Failed Prints & Material Waste:Automatically pauses printing when filament runs out, breaks or gets stuck, avoiding time and material waste from failed prints. ### High Sensitivity and Reliable Detection Built with high-precision detection mechanism, accurately identifies filament presence, works with 1.75mm PLA/ABS/PETG filaments. ### Durable and Compact Design Sturdy plastic housing with mounting screws, compact size (40×30×17.5mm) fits neatly on your printer without extra space. ### Easy Installation and Direct Replacement Comes with matching connector and mounting screws, simply replace the original sensor or add it as an upgrade in minutes.