I would like to warn anyone who owns a IPV8 (or is going to buy one), my IPV8 510 connector poke out in less than 2 months use. I mean the connector simply detached from the mod and partially protrude from its original position and the mod can not be used as usual any more.
So, do not screw your tank too tight on IPV8, because chances is, you might accidentally pull the whole 510 connector out from the mod.
I was very lucky that I got a free replacement from IPV staff when I attend Vapecon 2017 (on 2nd April at Kuala Lumpur, Malaysia). They give me a fee IPV Vesta (their latest product) which according to them, has only been pushed into the market for about a week.
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IPV Vesta runs on YiHi SX410 chipset and has a "Taste" mode where just by pressing the 3 buttons on the mod, you may set a power graph. i.e. You can set the wattage you want at each second for a total of 10 seconds.