Good to see these finally getting out to the public. I have been usingbthe zulus for a while now and it is the best bang for the buck. I have tested ALOT of day/night scopes and man it packs a punch. The arken app is also a portal for your firmware update. Yes you can focus the ir and with it on max and focused I was getting clear video of a horse at 375y. They are made with a removable pill so you will be able to swap the ir for a 940nm for a little more incognito setup. Also some short and long button presses give you some different things. When in the zeroing menu short press of power freezes the screen so you can move reticle to POI, left button long press goes from day to night mode, short press of left button while in night mode changes the ir brightness, short press of the right button is screen brightness 1-6, long press of right button brings up an information screen and turns wifi on repeat to turn off. Short press of the settings button will change your reticle color on the fly and the long press brings you into the menu, short press while on will put the unit in standby. I'm sure there is more but just off the top of my head. If anyone needs help feel free to reach out.