Active AirClean Filter (SF-AA 50 )Active AirClean Filter (SF AA 50 ) Active AirClean filter with TimeStrip helps filter unpleasant odours. Features: With active charcoal: Ideal for households with pets or smokers Safely seals in the dust With timestrip filter change indicator To maintain appliance performance, change the filter once a year Contents: 1 filter incl. for Complete C2, Complete C3, Compact C1, Compact C2