Exclusively ours! The Aura USB Ultrasonic diffuser is an essential oil atomizer that can diffuse any essential oil from lavender to sandalwood. Using an optimal frequency of over 2 million cycles per second the Aura USB Ultrasonic Diffuser atomizes essential oils breaking up molecules into a microscopic mist. The Aura USB Diffuser is the first and only aromatherapy diffuser capable of diffusing any essential oils enabling longer and more continuous diffusing without frequent refilling.