1) Expanded range of output voltage/wattage: 2v-8v / 5w-30w.
2) Spring Connector and Stainless Steel Thread.
3) New Streamlined Design on Top:  assembled perfectly with

20 diameter atomizers.
4) Arrow Button Lock Functionality.

5) High Stability and High Compatibility.

After-sale service:

1.Warranty: Batteries: 12 months; Components‘in function"(e.g. atomizers, resistance…): 3 months

2.We will replace the broken parts with new parts in the next order.

3.Choose the cheapest and safest shipping company.

4.Track the order until you get the goods.