TCELL™ odour control system refills dispense a consistent level of high quality fragrance for up to 60 days. Easy to install and activate refill. Covers areas up to 6,000 cubic feet. Requires no batteries and operates silently. Sold by each. White It supports routine maintenance and janitorial supply programs for Canadian workplaces, facilities, classrooms and home offices where odour control and a clean impression matter. The White option helps add a pleasant fragrance without complicating daily cleaning routines.