Product Features: Active Air Vent 65°C Filament Drying, Air-tight Filament Storage, Up to 24-color/Multi-material Printing, Brushless Servo Feeding Motor, RFID Filament Sync, The AMS 2 Pro is compatible with X1/P1 series printers for multi-material printing. The filament drying feature for these older generation machines will be fulfilled through an OTA update by the end of April. For X1/P1 owners, a switching adapter is needed to power the drying function. Since filament drying lasts long, you rarely need multiple adapters running simultaneously. The optional adapter helps lower the price. For H2D owners, your H2D can power anyone of the AMS 2 Pro(s) connected for drying, so if you're not planning to run multiple AMS 2 Pro for drying simultaneously, you won't be needing an adapter.