Indicates which power sources can be used for the corresponding flash unit.

Power source is the term used to describe the source of power used to generate the compressor.

Power source for loads defined as critical by applicable safety regulations. This supply must not be affected by a mains failure and is generally separate from other supplies.

The part of a wave used to gain powe for a particular manoeuvre.

The origin of electrical energy to run lights, motors, and appliances, etc. It can be a generator, solar panels or batteries.