Detecting More than Just Runout: Upon detecting nozzle clogging, filament runout, filament tying, and extruder malfunctions, V2.0 will promptly issue error alerts on the screen and automatically pauses printing. This prevents unnecessary resource wastage. Real-Time Status Indication:Easily know the filament status at a glance Normal Printing:The blue light flashes during smooth printing when the printer and filaments are functioning properly. Filament Runs out or is Broken:steady red light prompts the user to respond to a filament shortage or breakage. Others:Nozzle Clogging/Extruder Trouble/FilamentTyingA steady or extinguished blue light. Specifications Compatible ilament:All 1.75mm filaments Detection Length:2.88 mm (theoretical detection length, may need adjustment) Rated Voltage:3.3V-5V Working Temperature:-10 to 50 Working Humidity:10% to 90% Operating PrincipleEncoder+Pulley Set+Micro-Switch 4 Detections Nozzle Clogging Filament Runout Filament Tying Extruder Trouble Versatile Features Firmware Support:RRF,Klipper, Extruder Support:Bowden Drect-Drive Bi-rectional Feeding Status Light Photoelectric Sensor Lighter and Smaller:Enhances installation ease and space use without overburdening direct-drive extruders,preserving printing speed and accuracy. V2.0 weighs 36g,40% less than V1.0 and 35.95% smaller.The 36g excludes the Bowden tube connectors. Wide Compatibility:Supports any motherboard with available I/O ports(Endstop,Filament detection,BLTouch,Induction sensor,etc) Unique and Cool:Merges cool aesthetics,with utility,enhancing your 3D printing experience. Material: Metal+Plastic colour: black Package Contents: 1 x Smart Filament Sensor set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.