SUNLU S4 Pro Dual-Zone 3D Printer filament Dryer, 4-Spool, 380W, 85C Independent 45-85C zones dry four spools at once; supports 1.75, 2.85, and 3.00 mm with annealing RH control

[Independent Dual-Zone Design] An insulated partition separates the left and right chambers to reduce thermal interference; control both zones from one touchscreen while assigning separate settings to each side for a more flexible multi-material workflow [Independent 45-85°C Temperature Control] A dual-channel heating system lets each chamber operate independently of 45-85°C, allowing you to dry different filament types at the same time without applying the same temperature setting to every spool [Professional Annealing Mode] M02 maintains a controlled 70-85°C chamber environment for compatible functional prints that require 2–3 hours of post-print annealing, expanding the S4 Pro from routine filament drying to advanced maker workflows [Smart Humidity Control] In M03 mode, select an RH activation threshold from 30-50%; the dryer automatically starts when chamber humidity reaches the selected level and stops heating when humidity falls to 25%, helping protect stored filament from absorbing moisture again [Four-Spool Capacity with 380W PTC Heating] Holds up to four 1 kg spools, with capacity for 2 kg on each side; supports 1.75, 2.85, and 3.00 mm filament, including PLA, PLA Plus, PLA Meta, PETG, ABS, TPU, PA, PC, and Nylon, while the 380W PTC heater delivers efficient, controlled heating