Voltage Meter 510 Connection $11.98

Why would you need a Voltage Meter with a 510 connection? To check the voltage drop off. Basically what you would do to use this is just screw the whole unit onto what ever mod with a battery in it to get the current output voltage of your battery. Then you would screw on whatever 510 atomizer you wanted, fire your mod like you normally would and the voltage meter will read the output voltage of your atomizer. Take the second output reading, subtract it from the first output reading and now you have your voltage drop. The less of a drop, the stronger the mod is. Time to go see which one of your mods holds up the best.