Features:
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 thread. 
6. Vision Battery 1600mah 
7.  Charge With any USB eGo Charger

Specification:
Diameter： 14.5mm
Length： 116mm
Color ：stainless,blue,green
Variable voltage：3.2V to 4.8V
Weight ：60g/pcs
Advantage： 5 times off/on click button protection
Thread：510,eGo threading
Capactity：650/900/1100/1300/1600mah
Certificate： RoHs,CE