Extended interface – Bolt VD-420 Wireless Manual Flash User Manual

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Extended Interface

You can connect your VD-420 to an external power source or PC sync via the extended interface on the side
of the flash.

External power source
An external power source, such as the Bolt Cyclone Battery Pack, can greatly increase the number of flashes and
reduce the recycle time in between flashes. You will need a CZ type cable (not included).

Note: When the VD-420 is used with an external power source, the AA batteries must still be in the flash in
order to operate.