Enhance your vaping experience with the Plantsource Vape Pen Battery, designed with a robust 350mAH VV Battery for long-lasting performance. Easily recharge with the included USB Charger, ensuring you're never left without power. Customize your vaping with three voltage settings: Green at 3.4V, Blue at 3.7V, and Red at 4.0V. Simple to use, just press 5 times to turn On/Off, 3 times to adjust voltage, and 2 times to preheat. Hold the button down while using for the ultimate control and satisfaction.