The Rubbermaid Commercial TCell™ odor control system utilizes passive fuel cell technology to deliver precise, timed fragrance for up to 90 days of consistent odor control. Up to 33% refill source reduction over traditional 30 day systems Will Last 60 Or 90 Days Depending On Your Setting Standard Setting: 60 days -- Standard Size Washroom: 3 to 4 stalls/fixtures Light Setting: 90 days -- Smaller Size Washroom: 1 to 2 stalls/fixtures Recyclable refill components No Propellants Or Added VOCs Use With HDS# 127191 Rubbermaid® TCell™ Odour Control Dispenser