1st day fresh for 150 days (50 days each, on low). With avec gain scent parfum. Scratch and sniff. Formulated with: No dyes. No phthalates. No formaldehyde. Low level indicator. Blue light flashes when it might be time to refill. Febreze warmer has a blue light that: Flashes twice when first plugged in to show it's working. Flashes continuously when it may be time for a new refill. For use with P&G air fresheners SY-982, 3260, and 3262.