Simple and effective. Multiple colors. Compatible with most 510 cartridges. + 2 Click PreHeat Setting (2.0v) – Great for thick oils + Variable Voltage (2.0v- 4.0v) + Temp Control 400mAh Battery w/ Preheat + LED Lighting + 5 Click On/Off – Safety Feature + Universal USB Charging ABOUT OIL VAPORIZERS Oil vaporizers are vapes specifically designed for use with legal essential oils. Oil vaporizers are wickless and heat up to vaporize your substances and turn them into tasty vapor ready for inhalation.