Aqua Lung Apeks Regulator - Manual (Page 24)

US
24
WARNING:SCUBA regulators and equipment have
operational limits when used with, Emergency Auxiliary
Breathing Systems, Alternate Air sharing, Octopus and
Buddy Breathing and increases the risk of serious injury
or even death. You must ensure you understand these
limitations and you have received the correct level of training
and preparation of your equipment before you use Auxiliary
Emergency Breathing Systems.