This is a disposable clearomizer (1.8ohms coil) meaning that the coils are not changeable coils. The clearomizer can be refilled and will last anywhere from 1 to 2 weeks or perhaps longer. It depends on how much vaping is done. When it doesn't work anymore, then simply throw the unit away.
Each clearomizer comes in a box packaging.
We have a CE 4 refiller tip that is a great for refilling the clearomizer. The item can be found here: REFILLER FOR CE4, CE5, CE6 CLEAROMIZERS
. To use, simply remove the mouthpiece on the clearomizer and screw in the refiller tip and pour the e-juice into the filler and the liquid will run down into the clearomizer.