The Evolve Plus is one of our best selling concentrate pens we have ever carried! With its removable dual quartz coils and quick, easy function it gives you the quality of a rig on the go wherever you are. In addition it comes with a silicone container built in to the base and a standard micro USB charging port on the side of the battery. We also offer a 2 month limited warranty on the battery and have ceramic coils for purchase separately.