[4 Spools in 1 Box]: Experience uninterrupted 3D printing experience - the filament drying box can easily handle 4 rolls of 1 kg 3D printer filament at the same time. Let you easily enjoy the freedom of multi-color and multi-machine 3D printing [360° Heat Circulation]: Faster heating speed. Maximum heating of 110℃, set temperature constant temperature drying, according to different consumables, the stop temperature can be set for higher efficiency [Real-time Data Monitoring]: Equipped with a thermometer and humidity meter for real-time display. Insulation cotton is installed on the inner wall of the box to maintain temperature for a long time [Even Drying]: Hot air circulation is achieved through integrated fans and heating modules to ensure even heat distribution, effective drying, dehumidification, and constant temperature maintenance to achieve the best drying effect [Universal Compatibility]: 3D filament dryer is compatible with most 1.75mm/2.85mm 3D printer filaments. It is compatible with a variety of common filaments, such as PLA, PETG, TPU, ABS, and even PLA-CF, PA-CF, ASA, etc