The Tronian Nutron is button activated, allowing you to simply hold down the button to power your 510 oil cartridge. The button allows you to activate pre-heat mode which will warm your liquid before it’s vaporized. Nutron offers 3 voltage settings: 2.6V, 3.3V, 4.0V, and has been thoroughly tested with a multitude of different viscosity oils. The device is designed to work with a wide range of oils and viscosities.