The Zelos Nano starter kit by Aspire includes the Zelos Nano mod, 3-level power adjustment feature that automatically adapts to suit whichever compatible Nautilus coil. Best use for Nautilus 1.8Ω coils is: 9, 10, or 11W, or if you'd want a little higher use the Nautilus Mesh 1.0Ω coils at 13, 14, or 15W