_Red Yes, the description says it comes with a 100-240V AC adapter. Looking at the image, the power cord seems to be removable so you can supply your own with a fitting plug.

_Red There's a timer under flash sales. When that timer runs out, they go back to full price and will not be on sale again.

_Red The description says these goggles have adjustable focal length.

_Red All fpv gear has some latency. It's unrealistic to expect 0ms latency. If you're not happy with the receivers, buy new modules.

_Red No, these are not virtual reality glasses. It's more like a magnified 2D screen floating in front of your eyes.

_Red Yes, you need to buy your own antennas. You should search for a guide on fpv antennas to buy the right ones for you.

_Red No. These goggles only work with Walksnail digital fpv cameras. But you can buy an analog receiver with video out and feed the signal into the glasses.

_Red The large board seems to be mostly a breakout board with voltage regulator, usb-c port and presumably a usb communication chip to interface with the radar chip.

_Red You don't need an UK plug. It's removable, you can use a matching UK plug.

_Red Yes as long as it is 1S (one cell in series).

_Red It's a regulator. If you need to limit current, wire a high power resistor in series.

_Red No, this is a buck converter. It can't boost.

_Red It seems to be a common cathode two-color LED. You can just desolder it and extend it out with some wire, making sure the polarity is correct, or split it into two separate LEDs. To do this, connect both cathodes of the LEDs together and solder them to the middle hole. Then solder the anodes to the remaining two holes.

_Red This is a buck converter. It can only convert from a higher voltage to lower voltage. What you need is a boost converter.