?IMPORTANT?How to replace the filter set?After replacing the Activated Carbon Filter—Press and hold the Night mode botton on the remote control for 5 seconds.After replacing the Glass HEPA Filter—Press and hold the Wave mode botton on the remote control. The Combo Pack Filter Compatible with Dyson Air Purifier Models: Dyson Pure Cool DP04 Air Purifier and Fan, Dyson Pure Hot + Cool HP04 Air Purifier Heater and Fan, Dyson Pure Cool TP04 Air Purifier and Tower Fan. Package Included: 2× HEPA Filters, 2× Activated Carbon Filters. Manufactures names,number and illustrations are used for reference purposes only.