Product Features: Chip is 100% designed by cloupor Cloupor ZNA50 Output Power: 7W-50W Output Voltage : 3.6V—8.5V It can be used to 0.3 - 3.3 ohm atomizer Cloupor ZNA50 Reverse battery protection Fits for 18650/18500 battery ( Battery is included) Adjustable 510 pin