1. Clearly marked voltage setting that you will not need a magnifying glass to see. 2. 3.3V to 4.8V smooth turning voltage adjustment dial. 3. Short Circuit protection. 4. 5 Click on off button. 5. Works with 510 and EGO gear. 6. Vision Battery 650mah, 900mah,1100mah,1300mah. 7. Charge With any USB eGo Charger.
1. No tar or other carcinogenic substances. 2. Harmless to others or the environment. 3. No danger of second-hand smoking. 4. Can smoke in a public place