Electronic Vibrating Mesh Technology (V.M.T.) creates a dense therapeutic aerosol by the movement of medication through a metal alloy mesh. Offers the smallest, lightest, most portable electronic nebulizer to the aerosol dependent patient. 98% medication delivery. Universal adapter for masks and T-pieces. Detachable head for easy cleaning. Includes main power unit, unit cover, medication cup, mesh cap, mouthpiece/mask adapter, mouthpiece, instructional video and carrying case. Optional AC adapter not included. Weighs 6 oz. Uses two AA batteries (not included). Two year limited warranty.