Not sure if it's in the Advance guide, but I did a search for it in the online database and it came up empty.

8 Fire buttons with a ball type joystick on the left side.

Name: Eclipse Stick
Manufacturer: Interact Multimedia Products
Model #: SV-462A
No date of release on box, unit or instructions.

Features Listed:
8 Fire Buttons
Independent Auto Fire Control
Programmable Synchro-fire
Slow motion
LED Display Panel
Durable metal base
Extra long cord

Image (Just for verification purposes)