VOOPOO X217TC box mod has great craftsmanship and quality, gives you enjoyable senses. The mod requires two 21700 batteries self-developed with the power capacity up to 7500mAh, it is long lasting and durable. What’s more, it also compatible with 18650/20700 battery. On the side of battery covers, it is designed with a “V”shaped colorful breathing LED light, which realizes a stylish vape experience. The breathing LED light starts to flicker，the longer you inhale, the faster the frequency of light flashing will be.