We recommend using the Betaflight Configurator, the most popular tool for FPV drones. It allows you to configure all aspects of your drone, including flight rates, controller button assignments, and the on-screen display (OSD) for your goggles.

You can download it here:
https://github.com/betaflight/betaflight-configurator/releases

A smoke stopper for FPV drones acts like a safety fuse.

It limits the current flowing from the battery to the drone in case of a short circuit. This can prevent electrical components from overheating and releasing the infamous "magic smoke" - which means your expensive drone gets fried.

It's a handy tool for the first time powering up a new build to identify wiring problems before they cause permanent damage. Think of it as a cheap insurance policy for your drone's electronics. It's important to remember, however, that a smoke stopper is not a foolproof solution and should not replace double-checking your wiring with a multimeter.

First you can configure it on Betaflight or you can use a battery tester.

Remember that all the cells in your battery need to be at least 3.5V.

Anything below that is too dangerous. But if you see it on the goggle, the average should be around 3.5 or 3.6V.

Don't go below that, otherwise you can damage your battery.

Use a soldering iron that can go up to 400+. The normal melting point of solder is 380 degrees.

For the soldering material, we strongly recommend that you use flux. Buy solder that already contains flux, or choose solder and buy solder paste with it.

Buy those two things:

The High Purity Soldering Tool

Lead-Free Solder Paste

As a case we recommend a silicone work mat. This is heat resistant and great for working with solder.