Apeman A77 - How to test the water-proof case?; Water leak into the case and the camera was damaged, what should I do?

3. Is the remote water-proof ? Can I use it underwater ?
Please note that the remote control is not water-proof.
4.Can I attach an external mic to this camera ?
We are so sorry to tell you that you cannot attach an external mic adapter to this
camera. Only the new version A79 has this function.
5.How to use the accessories ?
Here is a link of how to use the accessories for your reference:
https://www.youtube.com/watch?v=5ITJhVcCfxY
Please also note that some of the accessories are not included and you can buy it from
Amazon if needed.
6.Where can I get a red filter ?
You can find one from Amazon and the recommended size is 1.51in
（
38.5mm
）
.
Water-proof Case
1.How to test the water-proof case?
There are some warm tips for this underwater camera:
1). Please make sure that the cover used is the waterproof-cover.
2). Before diving, you can put a piece of paper towel into the waterproof case, and
then close the waterproof case, and put it into the water for 15-30 minutes for testing.
You can also check if the waterproof case is leaking by pressing the button.
3).The machine is expensive, and it will be damaged once water leaked into the
camera. So please make sure that the case was closed tightly before diving.
4). If there is a small amount of fog inside the waterproof case, please note that it is
because the machine is working in the sealed case and the heat dissipation is poor,
thus causing the fog, which is a normal phenomenon and will not damage the
machine.
2.Water leak into the case and the camera was damaged, what should I do?
So sorry for bringing you such inconvenience.
Would you please help us confirm several things so that we can solve it for you
ASAP ?
1). Is the water-proof case broken ? Or the case is opened while using ? Or the case is
complete, but water leak into the case ?
2). Would you please kindly try the following steps to test this item?
Take out the battery, and then plug in the charging cable, connecting the camera with
your computer, to see whether it can be turned on. Better connecting it with PC with
the original USB cable.
Or take out the SD card to see whether it can be turned on and work normally[with