1.noo il absorbent sheets 2.tansparent-can see the e-liquid 3.big capacity 4.no leaking 5.CE,RoHS 1.the atomizer cap is separated from the atomizer--easy to see the capacity of e-liquid.2.Easy to inject the e-liquid.3.the cartridge do not include cotton, can accommodate more e-liquid.4.It has a atomizer cap to see the content of e-liquid.5.upgrade atomizer, no burning taste and no leaking.