actually sometimes it is too sensitive and turns the camera on by just brushing it. as said above, i prefer to turn on the camera make sure the little green light is blinking then put inside holder (with string attached so i cant lose my camera). so my method is turn on camera put inholder turn on bird and while i wait for gps i turn record on. that way i can see how long i have been recording mäybe a minute longer then i have been flying.