Complete Dual Set: comes with 2 lava rock diffusers, 2 rocks, and 2 wooden bases; Ideal for using in multiple places at once; Compact lava rocks measure 2 X 1 inches / 5 x 2.5 cm, and bases measure 2.8 x 1.2 inches /7 x 3 cm Versatile Aromatherapy: great for sauna, home, or ; Create a soothing atmosphere and promote relaxation anywhere All Purpose Diffuser: this sauna diffuser operates passively, requiring no electricity; Simply add 4 - 5 drops of your favorite essential oil directly onto the lava rock; The natural heat of the sauna or the normal room temperature then gently disperse the oil's fragrance Small Space Friendly: with its compact dimensions, this diffuser set is tailor - made for small spaces such as bedrooms, offices, or any cozy room; It fits seamlessly into your living or working environment, adding of tranquility and pleasant aroma without taking up much room; Ideal Aromatherapy Gift: A good present for friends and family who love natural aromatherapy, especially sauna enthusiasts. Combines practicality and aesthetics. It offers them distinct value, allowing them to enjoy the special experience of natural aromatherapy