400 mAh Draw-Activated 510 battery | Use the stylus touch tip to switch between Blue: 3.5V, Green: 3.7V, Yellow: 3.9V, and Red: 4.1V This vape pen battery is a multicolor buttonless beast, boasting high capacity, preheat, and variable voltage. It comes in a gorgeous chameleon multi-color finish with the charger as well. - Auto-Draw / buttonless battery in a rainbow finish. - Variable Voltage Output: 3.5V (Blue), 3.7V (Green), 3.9V (Yellow) and 4.1V (Red) - Preheat functionality - Stylus Touch Tip - 510 Thread Battery - Locking safety feature - 400mAh Battery Capacity - Screw-In USB Charger - Low power indication alert ( 10 Blinks)