HSYNCHRONIZED FIRING: the SYNC CORD and BUILT-IN SLAVE EYE
Hardwired Sync: Each unit arrives with a 15-foot sync cord for hardwired, synchronized
firing. The cord’s 1/8-inch miniplug connects to the flash unit on the back control
panel, then connects to your camera via PC-sync connection. With the sync cord
connected and the flash unit powered on, pressing your camera’s shutter will simultaneously fire the flash unit.
NOTE: If your camera does not have an input for this PC-connection, we offer a hot
shoe adapter (sold separately; please see our website at www.paulcbuff.com/hotshoeadapters.php to learn more).
Built-In Slave Cell: Each unit has a built-in slave tripper for wireless firing when used as
part of a multi-light setup. With a multi-light setup, you will only need to connect one
flash unit in the setup to your camera using the sync cord. With one unit connected,
the other units will fire at the same time via their slave trippers. The tripper on each
unit is activated by the slave cell, located on the back control panel, firing the unit
whenever it “sees” the light from another flash as far as 50+ feet away. This slave
cell is disengaged whenever a sync cord or “dummy plug” (used with some remote
controls) is inserted in the sync jack.
NOTE: The slave cell is designed to sense flashes of light (both visible and infrared);
any flash that it “sees” can trigger it, including the flash from another unit in your
setup, a conventional on-camera, built-in, or pop-up flash (and its pre-flash), and/or
an infrared remote transmitter. Although this gives you more options for triggering,
the presence of extraneous triggers must be considered when you are not the only
photographer in the area. Other flashes (whether on professional or even disposable
cameras), and infrared remotes can inadvertently trigger your flash unit(s).
We additionally offer various remote control options that provide synchronization
between your camera and your flash unit(s), allowing your flash unit(s) to be remotely
triggered. We additionally offer remote control options that provide complete control
over all parameters of the light. To learn more about the remote control options that
we offer for use with the AlienBees units (systems and components sold separately
from flash units), please visit our website.
• to learn about our CyberSync system, visit: www.paulcbuff.com/cybersync.php
• to learn about our LG4X system, visit: www.paulcbuff.com/lg4x.phpere's the SYNCH info for the Alien Bee units:

Last week I ordered a Carbon Fiber monopod from Amazon. (Actually, my wife orders for me since she always finds a way to get discounts that I can't & she usually is setting on some item she wants but does not cost enough to get free shipping.) Good news. The order arrived today. Bad news. I received a 40 inch oscillating house fan instead of a monopod. We have contacted Amazon & someone named Ron in some other part of the world is trying to figure out what happened. The package has the correct info on it & everything else is correct, routing, tracking, etc. My bet is that some scanner somewhere read a bar code wrong. Anyway, my GAS has been surppressed & I await further developments. Hope I get my monopod soon.

Let us know how you make out.

A Sony on-camera Speedlight would make no difference as far as photoelectric cells are concerned- they should respond to any flash if they are working. Check to see if your Buff lights have a switch to turn the photocells on and off.

So, I ran another test with the same results. A flash on the a7RM4 does not trigger the Buff lights. I CAN trigger ONE light with a sync cord; but not both. I didn’t see a switch to turn the photocell on or off. I have sent the Cyber Commander in for repair. I’ll keep you posted. Thanks.
By the way, Buff has excellent customer service. If there is an issue with that trigger you should contact them. Here's the link:

https://www.paulcbuff.com/Service-and-Repairs.html