Kanger's recommendation is to use the 1.2 ohm OCC coil heads between 12W-25W (http:// image.dhgate.com/0x0/f2/albu/g2/M01/52/03/rBVaG1TF24-AL2rTAACpDi7mttk832.jpg) (remove the space). However, I agree with the previous answer since your vape experience will depend on the ratio, flavor, and nic level of the juice you're using, so adjust your power to taste until you feel like it's dialed in for you.