Creality K1 Series CFS Upgrade Kit for Multicolor 3D Printer K1 MAX/ K1C/ K1 SE/ K1 3D Printing Machine Control Method: Control by the original touch screen Connection Method: USB to 485 Extruder: Direct drive extruder: (Filament cutter & run-out sensor included) Auto Filament Loading/Unloading: Yes (Connection to CFS is required)  UI: Updated with multicolor functions Printing Method: Wi-Fi Printing / LAN Printing  Firmware Update: Update by USB drive at first, then OTA can be used Slicing Software: Creality Print 5.1 and newer versions App: Creality Cloud App for Remote Control (Multicolor G-code file transfer is enabled; multicolor cloud slicing is not available yet) Dimensions: 379 × 314 × 276 mm Net Weight: 4.56 kg Number of Filament Slots: 4 Drying Method: Desiccant Filament Buffer: IN × 4 & OUT × 1 Number of Extensions: ≤ 4 RFID Filament Recognition : Yes Filament Diameter: 1.75±0.05 mm Connection Port: Creality 485 × 2 Power Supply: DC 24V  Rated Power: 20W Status Indicator: Indicator light (white/red) × 4 Display Screen: Segment LCD showing temperature and humidity Filament Spool Compatibility: 1Kg filament spool; diameter: 197-202 mm, thickness: 42-68 mm Supported Filaments: PLA/PETG/ABS/ASA/PET/PLA-CF; Not compatible with flexible TPU, damp BVOH/PVA, or warped cardboard spools. Auto Filament Relay: Yes