The Ikon is a work off of E2 type of cartomizers. They are syringed base units and are 100% functional up to 20 refills. Each refill varies on usage and can last a user from 2+ hours of vape time for heavy users and beyond for the moderate. Each order that contains withier Ikon kit or Ikon eTank will be supplied with a syringe if check box is ticked. Please use your equipment CAREFULLY.   

For Use, fill the syringe with desired e-liquid (PG based up to 70/30% PG/VG recommended to 2.5ml. Remove locking ikon cap from the top of the unit by a simple turn and pull. Remove Ikon's black mouth piece. Insert syringe into the side slot located on the outside clear rubber translucent ring within the unit. It is easily viewable. Use Ikons side window to fill unit. Stop filling when the e-liquid reaches the bottom of the white insert which is also clearly visible.  The Ikon e-Tank has a native 510 fitting and is compatible with Ego units.