HV Cyclers and the X

The Cyclers produce high voltage to make flashes recycle faster and get more flashes per charge.  They use HV Cables to connect to various models of flashes that have a high voltage input jack on the front or side of the flash.

The X's are super small versions that double the performance of some Nikon™ and Canon™ style flashes.  They are so small that they plug directly into the flash's hv jack.