Edit: Please see the Persei Vaporpedia Article as well. The herbal attachment called The 8 is being worked on right now, it will be available soon. Great things take time to make. Currently the Persei vaporizer is a variable voltage vaporizer, it can take 18650 3.7v, 2x rcr123 for 6.0 volts, and 2x18350 for total of 7.4v. The Persei will have all the attachments known to man... The Persei Vaporizer for herbs and concentrates.