1. Fire Button with safe lock
2. One peek with 510 adapter to prevent the over heating.
3. All metal parts 24k gold plated for better conductivity
4. Spring loaded 510 connector to support all BF atomizers
5. 24mm 510 adapter supports all 24mm & 22mm diameter BF atomizers
6. 3pcs food grade bottles with 7ml capacity
7. Padauk or Resin material