Answer:
LEDs are powered by alternating current AC.
Explanation:
The electricity will move in and out of cycles.
When the FPS won't math it'll flicker. Try switching to your camera's shutter speed instead. ( May be times your camera won't support it.)
Answer bro must have a mental disorder its like ur thumb HEAT WAVES the moon becomes red bc of heat waves didnt u say that anyways???
Explanation:
One risk might be that they might use copyright music and and the music creator might take legal action.
Generally I'd recommend not buying one online, tends to be cheaper from a shop - and better used, although their are some risks with 2nd hand devices, I think the big price cut it worth it.
If you did want to buy online, maybe Amazon or Ebay?