This ArOmis aromatherapy diffuser is a professional, therapeutic grade cold air pressure nebulizer designed with serious aromatherapy practitioners in mind. This base is made from beautiful wood in the straight line (Solum) shape stained dark red-brown (Nox). The bottles are made of clear glass and three styles are offered: The Merus with its smooth glass with gentle oval bowl tapering into a narrow neck with a flared rim on which sits its dedicated omni-directional cap; the Telum, which is a shorter version of the Merus with a uni-directional cap; and the stunning Vitus with artistic glass trails over its body and scalloped rim with omni-directional cap. The bottles fit into any color/style base.These units use no heat or water to vaporize oils, only 100% pure essential oils. They are designed for indoor use and are sold with electric AC power cord.