Hi this is a volt meter i have created and due to the interest i am pleased to make more and offer it for sale- this is what it looks like It will work on all mechanical mods i am unsure if it will work with advanced mods i have tried on a few with no luck so it is best to just buy this for your mechanical mods only, which makes sense anyway as they are important the check battery voltage were as most advanced mods have volt meters built in and low voltage protection. Depending on supply stock it may have black ends instead of silver. 510 connection, very tough and durable led colour red. Price- £20 delivered to all of uk. The list so far- 1. Raguri 2. whit77 3. Clint 4. Reevo 5. u8myufo 6. SFP 7. 8. 9. 10. Add your name to the list if interested or if your name is on the list and you are no longer interested let me know and i can remove it. please not e-pipe clearomiser and drip tip in photos are for reference only and the item for sale is just the volt meter.