This vase of exotic mosaic glass (in blue or gold/green multi) gently glows while fragrance fills the air. Plugs into any 120V wall socket to diffuse essential oil, wax melts, fragrance oil or our special No-Melt Tarts. ETL/cETL approved, with on/off switch for ease of use. Instructions: Choose Your Scent Load: The Plugables Fragrance Vase can be used with your favorite Belle Aroma No-Melt Tart or other scented plastic or wax product, essential oil, or fragrance oil. This is called the “scent load.” Of these, the Belle Aroma No-Melt Tart lasts longest and is easiest to handle. Note that most wax products will melt when warmed. Be sure to allow to cool and harden before removing. Directions for use: 1.Plug the warmer into a properly working 120-volt wall outlet with the cup facing upward. 2.Place the selected scent load in the warming cup. ScenTrio only: Select the desired timer and power levels (see below.)