Essential Oils Dog Collar Clip, Reduces Stress, Relieves Allergies, Enhances Focus and Good Sleep for Cats and Dogs. Set of 4 Pellets Made with 100% Pure Therapeutic Grade Aromatherapy Oil Stress relief: Bergamot, lavender, jasmine and ylang ylang. Allergies relief: Orange, rosemary, peppermint and lavender. ADHD/ focus: Atlas cederwood, bergamot ,lang ylang and lavender. Sleep well: Ylang ylang, lavender, chamomile and peppermint. Delivers aroma-therapy from essential oil-soaked pellets directly into the senses, instead of using the actual bottle to rub oils on skin. The effect of the pellet is personal, so it doesnt interfere with anyone around you. Each refill pellet is meant for one time use, lasting a duration of 25 days.