Introducing 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: Features a protected, cartridge drop-in design Fits most 510 thread cartridges Features cartridge swivel for proper mouthpiece alignment Powered by a high-quality 550mAh lithium-ion rechargeable battery core 3-LEDs indicate battery life and power settings Three (3) power/voltage settings (Low 2.8V, Medium 3.2V, High 3.6V) USB-C charging port + cable Dimensions: 2.625"L x 1.625"W x 0.75"D Weight: 66g Six (6) month limited warranty What's in the Box: 1x - Vessel Compass Series 510 Battery 1x - USB-C Charging Cable 1x - One Year Limited Warranty