1. Take cartridge out of the packaging.
2. Firmly screw on cartridge to battery. Do not over tighten. …
3. Remove rubber tip from cartridge mouthpiece. …
4. Tap battery button 5 times quickly to turn on. …
5. Hold button for 3-4 seconds then let go. …
6. You are now ready to enjoy your Evolab oil.

EvoLab’s cartridges are one of the best designs we have ever seen. Each hit feels smooth and powerful. The opening at the top is wide and comes with an easily adjustable airflow valve to make your hit feel exactly how you want it! The metal casing is strong, durable, and nearly leak-proof making great for on-the-go.