When installing the VB-C50FSi/ VB -C50Fi on the ceiling or a wall, check that it is strong enough to bear the weight of the VB-C50FSi/ VB -C50Fi including the mounting arm. Installation in a weak location could result in the VB-C50FSi/VB-C50Fi falling and causing serious injury. Check that the ceiling can hold either 3 times the weight of the camera and arm or 8kgs (whichever is heavier) for 1 minute.