Let the feeling of tranquility wash over you with this True Living Tranquil Waters fragrance crafted with essential oils. Crisp marine notes paired with light florals and refreshing melon feel like a breath of fresh air. 2pk of .67oz refills fits most Glade and Airwick warmers. 2pk of scented oil refills fills your space with the refreshing mix of crisp marine waters, light florals and fresh melon.Directions:1) Unscrew cap. 2) Push refill bottle into the warmer unit until you hear a click 3) Plug into outlet in the upright position only. If necessary, rotate the warmer unit plug. Do not plug in sideways or upside down. 4) Adjust fragrance control to desired intensity.