This unit doesn't come with an external power supply or a viewfinder. It offers high - quality 4K ultra HD recording capabilities.

Using this Hitachi camera is quite easy. First, connect your device to a proper power source if you have an external power supply. Then, you can start shooting high - quality 4K videos. Remember, this camera doesn't come with an external power supply or a viewfinder, so you'll need to get those separately if you need them. When it comes to maintenance, keep the camera clean and dry. Avoid exposing it to extreme temperatures or humidity. After each use, store it in a safe place to prevent any damage.