RASA ~ Om and Zampa Aromatherapy Diffuser Essence Diffuser Necklace length 65 cm Essential oil diffuser pendant, Size 3.6cm - diameter 8mm Perfect as a gift, a steel jewel is eternal, and the diffuser of perfumed essences will accompany the wearer for up to 5 days ♥ Material: ~ Rhodium-plated stainless steel - Waterproof, water resistant and unalterable. How do you use it: 1 - Unscrew the pendant 2 - Remove the swab and add 2/3 drops of essential oil 3 - Insert the swab again and screw the pendant back on 3 - The aroma of the essential oil will be released from the openings in the pendant and will persist for up to 5 days ♥ 4 - You can change the color of the pads to give your aromatherapy necklace a new look!