The wood Essential Oil Diffuser absorb and keep essential oils longer without water and electricity, eco-friendly and safe Natural tool for relieve tension and stress in daily busy work, driving, sleeping, long-distance travel, business trips Material: wood, volcanic Lava stone, premium stainless steel clip with rubber tube Color: wood color Convenient to use: Just drip 2-5 essential oil on the natural wood locket, then clip on car air-conditioning vent or home air condition vent for family and friends. A for birthday/Christmas/Anniversary/Father's Day/Mother's Day/Valentine's Day Pack content: 1 * Air Fresheners Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.