Vapor Flask V2.1 DNA 40 by Box Mods   @ http://BoulderVaporHouse.com Choose between Silver, Black, or Gunmetal. Made in the USA Features: •Designed and Manufactured in the United States by Vapor Flask •Constructed from Solid 6061 Aluminum •Variable Wattage Device •Revised Stainless Steel 510 Connector •Spring-Loaded Brass Contact •Custom Milled Aluminum Buttons •Micro USB Charger •Pass-Through Capability •Ergonomic Design •Requires 2 x 18650 batteries to operate (Uses only flat top batteries. Recommended to use two of same company and specs. Batteries sold separately) •Top Mounted OLED Display •22mm Profile •Clear Finish •Evolv DNA 40 Specifications (http://www.evolvapor.com/datasheet/dn…) •Power Regulated Digital Switch-Mode [More]