Because it makes an ok Joyetech chipped TC mod a good TC mod. RX200S SS316L TCR Evic Mini SS316L TCR For comparison Hotcig DNA200 SS316L TCR It's no DNA ↑ but makes a decent TC mod out of any Joytech mod. I also have it on An Eleaf TC200W, and a Pico with similar results. Definitely worth doing and it adds pre-heat to power mode. The red is the temp curve. http://nfeteam.org/ EDIT: I should mention as the coil dried out there was no pulsing.