I can't find any decent instructions for this thing. They're all terribly translated Chinese to English. Here's what I've found works. I hope it helps you.
The two triangle-shaped buttons near the keychain end and opposite the camera lens and microphone end don’t do anything.
Plug it in to charge - steady orange light comes on.
No indicator of complete charge - orange light never goes out.
Unplug it - steady orange light stays on - unit is on.
Firmly push on/off button to turn unit on in still photo mode.
Firmly push shutter release button to take a still photo.
Each push of the shutter release button takes a still photo.
Push and hold shutter release button until the orange light flashes three times and goes out - you are now filming even though the light is out and the unit seems to be off.
Firmly push shutter release button to end video - orange light comes on.
Note: There is no difference in appearance between a unit that is off and a unit that is filming a video.
Maximum clip length = 30 minutes.
Push and hold on/off button for three seconds until orange light turns off.
Auto-off after ~30 seconds.