MELO 4Product Introduction:The MELO 4 atomizer features an all-new EC2 series coil which is the upgraded version based on original popular EC coils, bringing you ultimate vaping experience with nice flavor. The retractable top fill system makes it really easy to fill the tank. You just need to slide the drip tip back and it reveals the fill port. The dual large air inlets allow optimal airflow for great vapor production. Not only does the MELO 4 come in various colors for your choice, it also provides you with two optional versions, one with 25mm diameter and 4.5ml e-liquid capacity and the other with 22mm diameter and 2ml capacity.