510 Battery Vaporizer Vessel CompassIntroducing Compass. Vessel Brand welcomed the challenge of designing a small, yet powerful device that takes form and function to new heights. The Compass features an incredible high capacity battery, our signature tuned airflow and an unparalleled ergonomic design that feels like it belongs in your hand. Note: 510 cartridges are not included, the cartridge included is non functional and is for merchandising purposes only. 510 Battery Features: