These are new and started appearing on healthcabin recently so thought I would post a little blurb here. I don't currently own one but plan to soon. Stand out feature is the ability to read the ohms from your atomizers (like the Provari does). Technical Specs: 1. The APV can work not only with 1pc 18650 li-ion battery but also 2pc 18350 li-ion battery. No need to change battery caps. If you want a short one, you can remove a short metal tube and use only 1pc 18350 li-ion battery. 2. The APV has 2 kinds of modes for your choices.You can swtich one mode to the other mode easily. Mode 1: constant voltage. In this mode, APV adjusts from 3.0 to 6.0 Volts in .1 volt increments. Mode 2: constant power. In this mode, APV adjusts from 3.0 to 15 Watts in .5 Watt increments. 3. The APV can check and display the atomizer's resistance. 4. The APV can check and display the li-ion batteries' voltage. 5. Like Vmax, APV has a 510/eGo threading and can work well on most atomizers with 510/eGo threading The APV comes with only body. You need to install batteries before using. Here is a review on Reddit.