HV VARI HappyVappy Pure Perfection Kit » This is truly a versatile unit. With two LCD screens! One shows the temperature you set and the other shows the actual temperature the Tempest Core is running at. With extreme push button accuracy you are able to vaporize consistently and precisely, and best of all it remembers your last temperatures setting if you turn it off. Which truly means you can get back in your groove with no fuss! The HV Vari is far superior to many of our competitors with dials and no temperature feedback. This unit is for the true herbal aficionado as you can really pin point the qualities of your various herbs to maximize your outcome and state of mind.