Honestly I'm not terribly familiar with the different KISS models so I'm not 100% sure myself. The writing on the cartridge says "UP TECH 3.7V" all written on a single line.
Looking on the vaporwarehouse.com O-Phos product page it does say, "Titanium Grade 2 K.I.S.S. Cartridge". Hopefully...
I ordered an O-Phos from VaporWarehouse.com a couple weeks back and had a question regarding the KISS cartridge.
Every atomizer I've used before with a 510 ecig battery (variable voltage, set in the 3.3-3.8 range) I can visibly see the coils heat up (get red) but with this KISS cartridge I do...