above photo
Coil Master 521 Tab - VapoRider
just came in the mail, $26...this is a heavy box mod, the Tesla Invader III, with a Wismec Theorem atty, and I didn't even have to hold it to keep it from tipping over ... the Theorem atomizer has the "stock" notch coil in it, supposed to be a .20 ohm, this is after 2 weeks of use and reads .23 "o" for ohms.
Above photo...the coilmaster 521 Tab reading the Tesla mod, that doesn't have a screen, at 3.77 "v" volts, Tesla says the lowest setting should be 3.7 volts, which is where I had it when I fired it in this photo, on the money...speaking of money, Ive quit smoking analogs for 5 weeks now, that's a savings of $250 for me, so I bought a gadget I really didn't need, Happy vaping.
Above photo...this is the "voltage checker" simply screws on to any 510 female thread PV mod or APV and plugs right in, with the coilmaster 521 tab having spring loaded center pins on both ohms tester and voltage testers, I don't think even with a box mod there will ever be an alignment problem with the two pieces of hardware hitting each other and not being able to test the voltage drop between the PV and the Atomizer.
I forgot to order an 18650 battery for this sucker...so I used the included usb adapter and plugged it into my laptop port, and was able to do everything (ohms, voltage, and fire the atty with my mod attached testing voltage drop) except fire the atomizer doesn't work without a good battery, or maybe a higher voltage usb port.
So there it is. Finally a picture, proof, of a box mod and atty mounted on a tester. That's me I guess, I have to see it to believe it. Without extensions, adaptors, and staring at a screen reading all week. Hope this helps someone that's like me.
Forgot to mention. I went to www.coil-master.net and was amazed at all the other products they produce. Low voltage items for cars, televisions, phones, etc. That said, its no wonder the 521 Tab works at a competitive price to anything else.